Long COVID, also known as Post-Acute Sequelae of SARS-CoV-2 infection (PASC), affects millions worldwide. Common symptoms—fatigue, brain fog, pain, and post-exertional malaise—can persist for months after the initial infection. As of 2025, no FDA-approved treatments specifically target Long COVID, prompting patients and providers to explore alternative and off-label therapies. One such option gaining attention is low-dose naltrexone (LDN) , a medication originally approved for opioid and alcohol dependence. When taken at much lower doses (1–4.5 mg/day), LDN has shown promise in modulating the immune system, reducing inflammation, and improving quality of life in patients with complex chronic conditions—including Long COVID. What Is Low-Dose Naltrexone (LDN)? Naltrexone is a non-selective opioid receptor antagonist approved in standard doses (50–150 mg/day) for substance use disorders. At low doses, however, LDN exhibits unique pharmacological properties : Analgesic Anti-inflammatory Immunomodulatory LDN has been used off-label for fibromyalgia, multiple sclerosis, Crohn’s disease, and myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) —a condition with notable overlap with Long COVID. Its potential benefits in Long COVID stem from its ability to dampen chronic inflammation and rebalance immune system activity. How LDN May Help with Long COVID Long COVID is believed to be driven by persistent immune activation , chronic inflammation, and possible autonomic dysfunction. Here’s how LDN may address these issues: 🧠 Immune Modulation LDN temporarily blocks opioid receptors, prompting a rebound increase in the body’s natural opioids (endorphins). This has downstream effects on immune regulation, including: Reduced microglial activation in the brain (linked to brain fog and fatigue) Suppressed T- and B-cell proliferation Improved neuroimmune balance ⚡ Ion Channel Restoration A study by Griffith University’s National Centre for Neuroimmunology and Emerging Diseases (NCNED)  found that Long COVID patients exhibit dysfunctional TRPM3 ion channels  in natural killer (NK) cells. These ion channels are crucial for cellular signaling and energy. LDN appears to restore TRPM3 activity, potentially improving: Fatigue Mental clarity Cellular immune responses 🔥 Anti-Inflammatory Effects LDN blocks Toll-like receptor 4 (TLR4)  pathways, reducing the production of pro-inflammatory cytokines. This mechanism may help relieve: Muscle/joint pain Post-exertional malaise Systemic inflammation 💤 Symptom Relief Many patients report improvements in: Fatigue Brain fog Sleep quality Overall function What Does the Research Say? Although larger randomized trials are still underway, preliminary findings  and patient reports support LDN’s use for Long COVID: Griffith University (2025): Published in Frontiers in Immunology , this study showed LDN restored TRPM3 function in NK cells, bringing cellular responses closer to normal. Miami VA Cohort (2023): In a study of 108 Long COVID patients, those using LDN had a fivefold higher likelihood of symptom improvement  compared to those receiving physical therapy alone. Pilot Study (2022): A single-center investigation of 38 patients found LDN (1–3 mg/day) improved energy, concentration, and pain after 8 weeks. Only 2 participants discontinued due to mild side effects (fatigue and diarrhea). LDN + NAD+ Study (2024): Combining LDN with NAD+ iontophoresis patches led to improvements in fatigue (Chalder Fatigue Scale)  and quality of life (SF-36)  scores. However, this small observational study lacked a control group. Patient Experiences: On platforms like X (formerly Twitter), patients describe substantial improvements. One user reported a friend feeling “70% recovered” after six months of LDN use. Ongoing Trials Larger randomized controlled trials (RCTs)  are in progress: Australia (Griffith University):  Testing LDN in 100 Long COVID patients to measure symptom improvement over 3 months. Canada & U.S.:  Additional trials are exploring LDN’s impact on fatigue, immune markers, and neurocognitive symptoms. Is LDN Safe? ✅ Generally Well-Tolerated Across studies, LDN has demonstrated a high safety profile. Side effects are usually mild and transient: Vivid dreams Headache Nausea or gastrointestinal upset In a 2022 pilot, only 5.3% discontinued due to side effects. ⚠️ Important Considerations Off-label status:  LDN is not FDA-approved for Long COVID or ME/CFS. Physicians unfamiliar with its use may hesitate to prescribe it. Access:  In the U.S., LDN can be obtained via compounding pharmacies but may not be covered by insurance. In the UK, it's usually only available privately. Dosing:  Most patients begin at 1 mg/day , increasing gradually to 3–4.5 mg/day . Some require lower doses due to sensitivity or side effects. Future Directions and Challenges LDN’s potential lies in its ability to address neuroinflammation , immune dysregulation , and cellular energy dysfunction —core features of Long COVID. However, challenges remain: Key Research Needs: Large-scale RCTs  to confirm efficacy and optimal dosing Mechanistic studies  to understand its effects on TRPM3, microglia, and cytokines Combination trials  pairing LDN with physical therapy, dietary changes, or mitochondrial support (e.g., NAD+, CoQ10) Personalized Treatment: LDN may be particularly beneficial for patients with: ME/CFS-like features Post-exertional malaise Cognitive dysfunction linked to neuroinflammation Conclusion Low-dose naltrexone is a low-risk, affordable, and accessible therapy  that holds potential for easing some of the most disabling symptoms of Long COVID. While the current evidence base is still evolving, LDN has shown enough promise to warrant further study—and for many, it already offers a glimmer of hope. If you’re considering LDN, consult with a healthcare provider experienced in its off-label use. As clinical trials progress, we may soon have more definitive answers on where LDN fits in the broader landscape of Long COVID treatment. 📌 Learn More: Search trials : ClinicalTrials.gov Explore LDN groups : Facebook, Reddit, and X communities for support and shared experiences Check resources : The ME Association, Frontiers in Immunology, BMJ Open Yoon Hang Kim MD www.yoonhangkim.com

Naltrexone is a medication best known for its role in treating alcohol and opioid use disorders, and more recently, for off-label uses like managing autoimmune conditions, chronic pain, and even mood disorders at low doses. But while its mechanism as an opioid receptor antagonist is well understood, researchers are still uncovering how biological sex and hormonal status can influence the body’s response to it. A new study sheds light on a compelling and often-overlooked factor: the menstrual cycle . Hormones Matter: The Role of Estradiol and Progesterone Researchers observed that women’s responses to naltrexone varied significantly depending on where they were in their menstrual cycle . Specifically, women in the luteal phase —the second half of the cycle, when estradiol and progesterone are elevated —showed the greatest hormonal and subjective responses  to the drug. Compared to both men and women in the early follicular phase (when hormone levels are relatively low), luteal-phase women experienced: Higher cortisol and prolactin levels  after taking naltrexone Greater increases in salivary cortisol More pronounced adverse subjective effects , such as nausea or mood changes These findings suggest that higher levels of reproductive hormones may enhance the body’s sensitivity to naltrexone , potentially intensifying both its therapeutic and side effect profile. Why Does This Matter Clinically? Understanding this hormonal sensitivity could be vital in tailoring treatment, especially for women using naltrexone either short-term (e.g., in detox settings) or chronically (e.g., for alcohol dependence, autoimmune diseases, or mental health applications). Key takeaways for clinicians and patients alike: Cycle timing may influence drug response : For women, the same dose of naltrexone might feel completely different depending on the day it’s taken. Side effects could vary : Luteal-phase women reported more severe side effects , which might affect medication adherence. Hormone-informed prescribing  might improve outcomes, reduce side effects, and support patient engagement. A Call for Personalized Medicine This study is a reminder that sex-based and hormone-based differences matter —not just in theory, but in everyday prescribing. As the fields of psychopharmacology and personalized medicine evolve, we may be moving toward an era where medication timing and dosing can be adjusted not only by age, weight, or metabolism—but also by the menstrual cycle . For now, patients and providers using naltrexone—especially women—may benefit from tracking symptoms alongside hormonal changes and keeping an open dialogue about how the medication feels at different points in the cycle.

Certainly! Here's your blog article  professionally formatted for web publishing—without any graphics, emojis, or bullet clutter. The layout is clean and ready for posting. Functional Medicine Approaches to Optimize Dopamine Dopamine is a powerful neurotransmitter that drives motivation, pleasure, attention, and movement. It plays a central role in our sense of reward and is implicated in conditions such as ADHD, depression, fatigue, and Parkinson’s disease. While conventional treatments often rely on medications that manipulate dopamine levels, functional medicine focuses on identifying and addressing the root causes of dopamine dysregulation through personalized, holistic strategies. Below are five evidence-informed functional medicine approaches to support optimal dopamine levels. 1. Nutrition to Fuel Dopamine Production Dopamine is synthesized from the amino acid tyrosine, which is abundant in protein-rich foods. Several nutritional cofactors are also required for efficient production and function of dopamine. Key nutrients include: Tyrosine:  Found in eggs, dairy, soy, turkey, fish, and legumes; also available as a supplement. Vitamin B6:  Required for the conversion of L-DOPA to dopamine. Folate and Vitamin B12:  Support methylation pathways critical for neurotransmitter synthesis. Iron and Zinc:  Cofactors for tyrosine hydroxylase, the enzyme that catalyzes dopamine synthesis. Vitamin C:  Assists in the conversion of dopamine to norepinephrine. Clinical evidence: Iron deficiency has been associated with reduced dopamine transporter function and worsening symptoms in conditions such as ADHD and restless legs syndrome (Youdim et al., 2004; Konofal et al., 2008). A 2014 randomized controlled trial demonstrated that iron supplementation improved symptoms in children with ADHD and low ferritin levels. Citation: Konofal, E., et al. (2014). Iron supplementation in children with attention deficit hyperactivity disorder and low ferritin levels: A randomized controlled trial. Archives of Medical Research , 45(8), 650–656. https://doi.org/10.1016/j.arcmed.2014.11.001 For a broader review on botanical and nutritional approaches, see:Dutta T. et al. (2022). Phytotherapy for attention deficit hyperactivity disorder (ADHD): A systematic review and meta-analysis. Frontiers in Pharmacology , 13, 827411. 2. Sleep Optimization: Regulating the Dopamine Clock Dopamine activity follows a circadian rhythm, peaking during the day to support alertness and falling at night to allow restful sleep. Chronic sleep deprivation can blunt dopamine receptor sensitivity and impair both mood and cognition. Functional strategies to support dopamine through sleep: Maintain consistent sleep-wake cycles. Limit screen exposure and blue light in the evening. Supplement as needed with melatonin, magnesium glycinate, or L-theanine. Increase exposure to natural daylight, particularly in the morning. Clinical evidence: Volkow et al. (2012) demonstrated that sleep deprivation reduces dopamine D2/D3 receptor availability in the striatum. A 2019 meta-analysis by Masi et al. showed that melatonin supplementation improves sleep onset and duration in children with ADHD, indirectly enhancing attention. Citations: Volkow, N. D., et al. (2012). Evidence that sleep deprivation downregulates dopamine D2R in ventral striatum in the human brain. Journal of Neuroscience , 32(19), 6711–6717. https://doi.org/10.1523/JNEUROSCI.0031-12.2012 Masi , G., et al. (2019). Melatonin for sleep disturbances in children with attention-deficit/hyperactivity disorder: A systematic review and meta-analysis. Journal of Child and Adolescent Psychopharmacology , 29(6), 427–436. https://doi.org/10.1089/cap.2019.0012 3. Exercise: Movement as Dopaminergic Medicine Physical activity is one of the most accessible ways to boost dopamine levels and receptor sensitivity, especially in the prefrontal cortex—where attention, motivation, and impulse control are regulated. Recommended approaches: Engage in 30 to 45 minutes of aerobic exercise most days of the week. Include movement forms that are enjoyable or novel to activate the brain’s reward pathways. Clinical evidence: Aerobic exercise increases dopamine receptor availability and enhances cognitive control (Robertson et al., 2016). A 2015 randomized trial found that children who participated in 30 minutes of daily structured physical activity experienced significant improvements in attention and behavior. Citation: Hoza, B., et al. (2015). A randomized trial examining the effects of aerobic physical activity on attention-deficit/hyperactivity disorder symptoms in young children. Journal of Abnormal Child Psychology , 43(4), 655–667. https://doi.org/10.1007/s10802-014-9929-y 4. Stress Management and Mind-Body Therapies Chronic stress can deplete dopamine, reduce receptor sensitivity, and raise cortisol levels—all of which disrupt dopamine's normal functioning in the brain. Functional stress-reduction practices include: Mindfulness meditation:  Shown to increase gray matter density in areas rich in dopamine receptors. Yoga and breathwork:  Support autonomic nervous system balance and lower cortisol. Cold exposure:  Brief cold showers have been shown to increase dopamine levels by up to 250%. Vagal stimulation and gratitude practices:  Improve parasympathetic tone and emotional regulation. Clinical evidence: A 2018 meta-analysis by Evans et al. found that mindfulness-based interventions significantly improved symptoms of inattention and impulsivity in ADHD. Shevchuk (2008) showed that cold exposure stimulates dopaminergic activity through hypothalamic activation. Citations: Evans, S., et al. (2018). Mindfulness-based interventions for youth with ADHD: A systematic review and meta-analysis. Journal of Attention Disorders , 22(9), 873–884. https://doi.org/10.1177/1087054717710767 Shevchuk , N. A. (2008). Adapted cold shower as a potential treatment for depression. Medical Hypotheses , 70(5), 995–1001. https://doi.org/10.1016/j.mehy.2007.04.052 5. Removing Dopamine Disruptors Functional medicine recognizes that healing requires not only adding supportive elements but also removing harmful ones. Several lifestyle and environmental factors can impair dopamine production and receptor function. Common dopamine disruptors: Chronic inflammation from food sensitivities (e.g., gluten, dairy). Heavy metals such as lead and mercury, which damage dopamine neurons. Overstimulation from social media, processed foods, or excessive screen time. Mold or biotoxins that impair the hypothalamic-pituitary-adrenal (HPA) axis. Functional medicine providers often utilize environmental medicine labs and detoxification protocols—such as sauna therapy, antioxidant support, or binders—to evaluate and address these disruptors when clinically indicated. Final Thoughts Dopamine is central to motivation, focus, mood, and resilience. Functional medicine offers a systems-based, individualized approach to dopamine optimization that goes beyond pharmaceuticals. By focusing on root causes and lifestyle interventions—nutrition, sleep, exercise, stress regulation, and environmental detox—this approach supports the body’s innate capacity to regulate neurotransmitters naturally. If you're experiencing low motivation, poor focus, or emotional instability, consider working with a functional or integrative practitioner to assess your dopamine pathways and personalize your care plan.

Here's a formatted version of your content as a professional, citation-rich blog article: Functional Medicine Approaches to ADHD: A Whole-Person Strategy Attention-deficit/hyperactivity disorder (ADHD) is a complex neurodevelopmental condition traditionally managed with stimulant medications. While these can be effective, functional medicine offers a complementary or alternative approach—aiming to identify and treat the root causes of ADHD symptoms through a personalized, systems-based lens. Functional medicine emphasizes nutrition, gut health, sleep hygiene, physical activity, stress management, and environmental detoxification as foundational interventions. This article explores evidence-based functional medicine strategies for ADHD, referencing clinical trials and systematic reviews where available. 1. Nutritional Interventions Elimination Diets and Food Sensitivities Food sensitivities and allergies may trigger neuroinflammation, contributing to hyperactivity and inattention. Elimination diets have shown promising results in identifying and removing problematic foods. A landmark randomized controlled trial known as the INCA study found that 64% of children following a restricted elimination diet experienced significant improvement in ADHD symptoms compared to controls. The diet removed potential allergens like dairy, wheat, and artificial additives. Citation : Pelsser, L. M., et al. (2011). The Lancet , 377(9764), 494–503. DOI: 10.1016/S0140-6736(10)62227-1 Nutrient Supplementation Several nutrients support neurological health and have been associated with symptom reduction in ADHD: Omega-3 Fatty Acids : A 2017 meta-analysis of 16 RCTs concluded that omega-3 supplementation (particularly EPA) significantly improved attention in children with ADHD. Citation : Chang, J. P., et al. (2017). Neuropsychopharmacology , 43(3), 534–545. DOI: 10.1038/npp.2017.160 Zinc, Magnesium, and Vitamin D : A 2016 review highlighted modest but meaningful improvements in ADHD symptoms with supplementation, particularly in individuals with documented deficiencies. Citation : Saul, A., et al. (2016). Current Psychiatry Reports , 18(12), 112. DOI: 10.1007/s11920-016-0748-2 Low-Sugar, Whole-Food Diets Whole-food, anti-inflammatory diets may protect against ADHD, while diets high in refined sugar and processed foods may worsen symptoms. A 2019 meta-analysis found that nutrient-poor, high-sugar diets increased ADHD risk, while Mediterranean-style diets had a protective effect. Citation : Del-Ponte, B., et al. (2019). Journal of Affective Disorders , 252, 160–173. DOI: 10.1016/j.jad.2019.04.061 2. Gut Health and the Gut-Brain Axis Emerging research highlights the microbiome’s influence on brain function and behavior, including neurotransmitter production and inflammation modulation. Probiotics and Microbiota Support A randomized trial found that early-life supplementation with Lactobacillus rhamnosus GG  reduced the risk of ADHD and other neurodevelopmental disorders. Citation : Pärtty, A., et al. (2020). Pediatric Research , 87(4), 677–683. DOI: 10.1038/s41390-019-0609-6 Gut Healing Protocols Functional approaches often involve identifying food intolerances and supporting gut barrier integrity using nutrients like L-glutamine and prebiotics. While direct trials in ADHD are limited, these strategies are increasingly used in integrative care settings. 3. Sleep Optimization Poor sleep exacerbates ADHD symptoms. Functional medicine promotes both behavioral and nutritional strategies for improving sleep. Melatonin for Sleep Regulation A 2019 meta-analysis found melatonin supplementation improved sleep onset and duration in children with ADHD, indirectly supporting better daytime behavior. Citation : Masi, G., et al. (2019). Journal of Child and Adolescent Psychopharmacology , 29(6), 427–436. DOI: 10.1089/cap.2019.0012 Functional interventions may include melatonin, blue-light reduction, consistent routines, and magnesium-rich foods. 4. Physical Activity and Exercise Exercise boosts dopamine and norepinephrine levels, improving attention and executive function. A 2015 RCT demonstrated that 30 minutes of aerobic exercise five days a week significantly improved attention and impulse control in children with ADHD. Citation : Hoza, B., et al. (2015). Journal of Abnormal Child Psychology , 43(4), 655–667. DOI: 10.1007/s10802-014-9929-y Functional medicine encourages consistent movement tailored to individual preference—whether running, martial arts, or dance. 5. Stress Reduction and Mind-Body Therapies Chronic stress and dysregulated cortisol may worsen ADHD symptoms. Mind-body techniques can help regulate arousal and support emotional control. A 2018 review found mindfulness-based interventions had moderate effects in reducing inattention and hyperactivity in children and adolescents. Citation : Evans, S., et al. (2018). Journal of Attention Disorders , 22(9), 873–884. DOI: 10.1177/1087054717710767 Yoga, breathwork, meditation, and cognitive behavioral strategies are frequently integrated into functional treatment plans. 6. Environmental Toxin Reduction Exposure to neurotoxicants like lead, mercury, and pesticides has been linked to ADHD, especially in genetically vulnerable individuals. A 2016 review connected environmental toxin exposure with increased ADHD risk, suggesting that reducing these exposures may improve outcomes. Citation : Nigg, J. T., et al. (2016). Journal of Child Psychology and Psychiatry , 57(3), 231–233. DOI: 10.1111/jcpp.12511 Practical strategies include using organic produce, filtered water, and minimizing plastics and household chemicals. 7. Personalized Testing and Biomarkers Functional practitioners often use lab testing to assess nutrient levels, metabolic markers, and genetics. One example is ferritin: Low iron stores are associated with worsened ADHD symptoms, and a 2014 RCT found symptom improvement with iron supplementation in children with low ferritin. Citation : Konofal, E., et al. (2014). Archives of Medical Research , 45(8), 650–656. DOI: 10.1016/j.arcmed.2014.11.001 Other commonly evaluated markers include vitamin D, methylation factors (like MTHFR), and heavy metal burden. Limitations and Clinical Considerations While several strategies (e.g., omega-3s, exercise, melatonin) are backed by solid evidence, others (like detoxification protocols or leaky gut interventions) need more robust clinical trials. Functional medicine emphasizes individualization. What works for one child may not work for another. These strategies are often best used alongside , not in place of, conventional treatments—especially when symptoms are severe. Conclusion Functional medicine offers a holistic framework for ADHD care that goes beyond symptom suppression. By targeting nutrition, gut health, sleep, physical activity, stress, and environmental triggers, functional interventions may complement traditional therapies and improve quality of life. A growing body of evidence supports this integrative approach, though personalization and professional guidance remain essential.

Serotonin vs. Dopamine: Understanding Two Powerful Brain Chemicals When it comes to mental health, motivation, and mood, two neurotransmitters stand out: serotonin  and dopamine . Though they often interact, their roles in the brain—and the body—are distinct. Serotonin Role : Promotes mood stability and overall well-being. Functions : Regulates mood, sleep cycles, appetite, digestion, and social behavior. Associated Issues : Low levels : Depression, anxiety, irritability. High levels : Risk of serotonin syndrome (especially with certain medications). Key Brain Regions : Prefrontal cortex, amygdala, hippocampus. Dopamine Role : Drives motivation, reward, and movement. Functions : Reinforces pleasure, attention, goal-seeking behavior, and fine motor control. Associated Issues : Low levels : Parkinson’s disease, attention-deficit/hyperactivity disorder (ADHD). High levels : Linked to addiction, schizophrenia, impulsivity. Key Brain Regions : Substantia nigra, ventral tegmental area (VTA), prefrontal cortex. Key Differences Mood vs. Drive : Serotonin fosters calm and satisfaction; dopamine energizes and activates. Physical Impact : Serotonin influences the gut and sleep, while dopamine controls movement and reward-seeking. Neurochemical Balance : Serotonin helps regulate impulsivity; dopamine boosts motivation. A healthy mind depends on a delicate balance between the two. Can Serotonin/Norepinephrine modulation help with ADHD? Duloxetine and venlafaxine can be administered to treat symptoms of ADHD while being well tolerated. It seems that duloxetine is more potent in reducing ADHD symptoms. It can also be concluded that venlafaxine is more effective in females, and is more effective on inattentive symptoms of ADHD rather than hyperactive symptoms. Dezfouli RA, Hosseinpour A, Ketabforoush S, Daneshzad E. Efficacy, safety, and tolerability of serotonin-norepinephrine reuptake inhibitors in controlling ADHD symptoms: a systematic review and meta-analysis. Middle East Current Psychiatry. 2024 Jan 31;31(1):8. Dopamine vs. Endorphins: Motivation Meets Euphoria Our brains run on complex chemistry, and two of the most influential molecules behind how we feel and act are dopamine  and endorphins . Though both are tied to pleasure and well-being, their roles, triggers, and effects differ significantly. Dopamine Role : A neurotransmitter that powers motivation, reward, and movement. Core Functions : Fuels pleasure, motivation, and goal-directed behavior. Regulates movement through the basal ganglia. Enhances focus, learning, and anticipation of rewards. Key Effects : Produces short bursts of pleasure when we pursue or achieve something meaningful—whether it’s food, praise, or accomplishment. Associated Issues : Low levels : Parkinson’s disease, ADHD, anhedonia (inability to feel pleasure). High levels : Linked to schizophrenia, risk-taking behavior, and addiction. Primary Brain Regions : Substantia nigra, ventral tegmental area (VTA), and prefrontal cortex. Endorphins Role : Natural opioids—neuropeptides that ease pain and boost mood. Core Functions : Reduce pain and stress, often creating a euphoric state (the classic “runner’s high”). Promote feelings of relaxation and well-being. Support stress regulation and modulate immune response. Key Effects : Released during exercise, laughter, sex, or pain, helping the body cope with stress and discomfort. Associated Issues : Dysregulation isn’t fully understood, but low levels  may worsen mood disorders or pain sensitivity. Primary Action Sites : Throughout the brain and body, especially in pathways regulating pain and stress. Key Differences Between Dopamine and Endorphins Aspect Dopamine Endorphins Function Drives motivation and reward anticipation Acts as a natural painkiller and mood stabilizer Trigger Released in response to rewards or goal achievement Triggered by pain, stress, or physical activity Effect Duration Short bursts tied to goal-oriented behavior Longer-lasting calming or euphoric effects Pleasure Type Energizing and motivating Soothing and relieving

Part II: ADHD and Dopamine/Norepinephrine modulation - Ritalin and Wellbutrin Ritalin  and Wellbutrin —two medications that affect brain chemicals like dopamine  and norepinephrine , but in very different ways. 🧠 How They Work Ritalin Wellbutrin Type Stimulant Antidepressant (NDRI) Dopamine Boost Strong Moderate Norepinephrine Boost Moderate Moderate Onset Fast (30–60 min) Slow (1–2 weeks) Serotonin None Minimal What They're Used For Ritalin  is FDA-approved for ADHD  and works quickly to improve attention and reduce impulsivity. Wellbutrin  is approved for depression  and smoking cessation , and used off-label for ADHD , especially with coexisting low mood. Pros and Cons Ritalin Pros: ✅ Fast, potent focus aid✅ Proven ADHD treatment Ritalin Cons: ❌ May cause insomnia, anxiety, appetite loss❌ Controlled substance Wellbutrin Pros: ✅ Non-stimulant, less abuse risk✅ Helps with energy, mood, and smoking cessation Wellbutrin Cons: ❌ Slower onset❌ Can worsen anxiety or raise seizure risk Which Should You Choose? Need quick, strong ADHD relief ? → Ritalin Battling focus + depression/fatigue ? → Wellbutrin Concerned about stimulants or addiction risk ? → Wellbutrin Bottom Line Ritalin  is best for classic ADHD symptoms. Wellbutrin  is great when low motivation, mood, or energy are also in the mix. Reasearch: Can Wellbutrin (bupropion) treat ADHD as well as Ritalin (methylphenidate)? Results A total of 146 subjects in four RCTs comparing bupropion with methylphenidate in the treatment of ADHD were included. The pooled mean changed scores of the Iowa–Conner’s Abbreviated Parent and Teacher Questionnaires and the ADHD Rating Scale‐IV for parents and teachers of children and adolescents with ADHD in the bupropion‐ and methylphenidate‐treated groups were not significantly different. Additionally, the pooled mean changed score in adult ADHD between the two groups, measured by the ADHD Rating Scale‐IV and the Adult ADHD Rating Scale, was also not significantly different. The pooled rates of response, overall discontinuation, and discontinuation due to adverse events between the two groups were not significantly different. Maneeton N, Maneeton B, Intaprasert S, Woottiluk P. A systematic review of randomized controlled trials of bupropion versus methylphenidate in the treatment of attention-deficit/hyperactivity disorder. Neuropsychiatric disease and treatment. 2014 Aug 1:1439-49.

PART 1 - RITALIN & DOPAMINE/NOREPINEPHRINE How Ritalin Boosts Dopamine to Help Manage ADHD: Understanding Root Causes May Allow Functional Medicine to Explore Alternative Ritalin by focusing on Dopamine Norepinephrine: Ritalin (methylphenidate) is one of the most widely prescribed medications for attention deficit hyperactivity disorder (ADHD). While it’s often associated with improving focus and reducing hyperactivity, the key to how it works lies in its effect on a powerful brain chemical: dopamine . Dopamine plays a central role in attention, motivation, impulse control, and reward processing. Research shows that individuals with ADHD often have dysregulated dopamine activity, especially in brain regions responsible for executive functioning. Ritalin helps correct that imbalance. How Ritalin Works: Dopamine in Action Blocks Dopamine Reuptake - Ritalin attaches to dopamine (and norepinephrine) transporters in the brain, blocking their reabsorption into neurons. This causes dopamine to remain longer in the synaptic cleft—the space between brain cells—enhancing its activity. The prefrontal cortex and striatum, both crucial for focus and self-regulation, are particularly affected. Increases Dopamine Release - Ritalin also promotes the release of dopamine from neurons, further increasing its availability. This dual action provides a stronger and more sustained dopamine signal, helping the brain filter distractions and stay on task. Improves Brain Function in ADHD By increasing dopamine and norepinephrine, Ritalin strengthens the connections between neurons involved in planning, attention, and impulse control. In people with ADHD, this leads to better focus, reduced impulsivity, and improved emotional regulation. What to Expect: Timing and Effects Onset : For immediate-release formulations, effects typically begin within 30 to 60 minutes. Duration : The benefits usually last 3 to 6 hours for short-acting Ritalin and up to 12 hours for extended-release versions (like Concerta). Metabolism : Ritalin is broken down in the liver and excreted through the urine. Potential Side Effects While many find Ritalin effective, it's not without risks. Common side effects include: Insomnia Reduced appetite Increased heart rate or blood pressure Anxiety or restlessness Because of its stimulant properties and potential for misuse, Ritalin is classified as a Schedule II controlled substance  in the U.S. Ritalin Is a Tool—Not a Cure Ritalin doesn’t cure ADHD—it helps manage the symptoms by supporting the brain’s natural chemistry. Its effectiveness can vary between individuals and is often optimized when paired with behavioral therapy, coaching, or lifestyle interventions. Part II will explore further dopamine/norepinephrine hypothesis Part III will explore serotonin and endorphine Part IV Functional Medicine and ADHD In summary, understanding the root causes of how Ritalin (methylphenidate) works may allow functional medicine to explore alternative by focusing on Dopamine/Norepinephrine modulation. Part II will explore ADHD and dopamine/norepinephrine modulation by comparing Ritalin (methylphenidate) to Wellbutrin (bupropion)

A novel combination of drugs—an immune checkpoint inhibitor and the anti-parasitic medication ivermectin —has shown powerful results in preclinical research against triple-negative breast cancer, according to a City of Hope study published in npj Breast Cancer . Triple-negative breast cancer is notoriously hard to treat because it lacks three key proteins (estrogen, progesterone, and HER2 receptors) that are typically targeted by existing therapies. But researchers, led by Dr. Peter P. Lee, discovered that combining anti-PD1 monoclonal antibodies with ivermectin dramatically improved outcomes. Here’s how it works: Ivermectin turns "cold tumors" (lacking immune cells) into "hot tumors" by triggering immunogenic cell death , which attracts cancer-fighting T cells. Once tumors are "hot," checkpoint inhibitors (anti-PD1) can effectively activate the immune system to destroy the cancer. Individually, these drugs had little effect—but together, they had a powerful, synergistic  impact. In animal models, 40–60% of treated subjects completely eradicated their tumors and  resisted reintroduction of the cancer. “This is the first time we can show that by adding an inexpensive, existing drug, we can make breast cancer treatable with immune checkpoint therapy,” said Dr. Lee. “It’s the combination that’s the magic.” Why this matters: Anti-PD1 therapies can cost ~$15,000 per dose. Ivermectin? About $30 per dose. Both drugs are already FDA-approved and have established safety profiles. The research also found the combo worked in a wide range of scenarios: before and after tumor surgery, and even against metastatic cancer. Next step: Testing optimal dosing in preparation for a first-in-human clinical trial.

How Can Integrative and Functional Medicine Help Solve Complex Conditions? Integrative and functional medicine are uniquely suited to addressing complex medical conditions. Integrative medicine considers the full spectrum of a person's well-being—mind, body, emotions, and spirit—acknowledging how each aspect contributes to overall health. Functional medicine complements this by expanding the investigative scope, allowing for a deeper understanding of the root causes of illness. Take a seemingly straightforward thyroid condition, for example. What appears simple may actually be quite complex. Functional medicine enables a comprehensive evaluation by utilizing advanced diagnostic tools and extensive lab testing. This includes not only TSH, but also free T3, free T4, reverse T3, anti-thyroglobulin antibodies, and thyroid peroxidase antibodies—just to name a few. There are numerous other tests available to provide a more complete picture. The strength of this approach lies in its ability to both zoom out—viewing the body as a whole system through an integrative lens—and zoom in—using functional tools to explore specific biochemical imbalances at a microscopic level. This dual perspective allows practitioners to uncover underlying causes that might otherwise go undetected, offering truly personalized and effective care.

For those exploring integrative oncology options: Most major centers—such as MD Anderson, Memorial Sloan Kettering (MSK), and City of Hope—offer services under the Society for Integrative Oncology (SIO) framework. In my opinion, SIO can be somewhat dated and conservative in its approach. For our integrative oncology patients, I often recommend a metabolic approach to cancer —specifically therapeutic ketosis—combined with low-dose naltrexone (LDN) . I encourage you to look into the work of Berkson  on this topic (search: "Berkson + LDN + Cancer"). This combination has yielded the most consistent clinical benefits in my practice, particularly for symptom management and quality of life during active treatment or in advanced disease stages. The original Berkson protocol also incorporates IV alpha-lipoic acid. Another helpful resource is Jane McLelland’s book , which outlines the Care Oncology Clinic protocol  using generic medications. While I have not adopted that specific protocol at this time, I do see its value. In fact, a recent patient of mine chose the Care Oncology route and declined the ketogenic approach; unfortunately, they later developed brain metastases. While anecdotal (n=1), it highlighted for me the potential neuroprotective advantages of ketosis. Instead of pharmaceutical protocols, my practice focuses on matching medicinal mushrooms to cancer types , alongside an acupuncture protocol  developed by a late Korean master. This protocol addresses energy balance, physical discomfort, and emotional well-being. Herbal support is customized based on each patient’s symptoms. Most importantly, I always recommend patients read Bernie Siegel, MD’s work , especially Love, Medicine and Miracles , and begin cultivating a mindset of becoming an “exceptional cancer patient.” Mental health and resilience are vital—working with a therapist or counselor can be transformative. During my time at the University of Kansas Integrative Medicine program , I participated in research on high-dose intravenous vitamin C. While it was found to be safe and supportive of quality of life, it did not improve survival outcomes. Currently, I lead the Integrative Oncology program at the Memorial Institute of Health & Healing in Carthage, IL , where we accept most insurance plans, including Medicare and Illinois Medicaid. Learn more here: Memorial Institute of Health & Healing . I also have a telemedicine private practice  serving Texas, Florida, and Georgia for those who cannot travel to Illinois. For those located elsewhere: California : I highly recommend Dr. Myrto Ashe  for a functional medicine approach and Dr. Donald Abrams (UCSF)  for a more conservative integrative oncology perspective. New York City : MSK is a strong starting point. Advanced cancer patients : I urge you to consider a second opinion at MD Anderson (Houston, TX) . They tend to take the most aggressive approach, and I’ve seen them help patients outlive prognoses after other institutions had given up. Finally, I encourage all patients to explore clinical trials  and empower themselves with knowledge. As Bernie Siegel emphasized, the empowered patient often becomes the exceptional one. Yoon Hang Kim MD MPH www.directintegrativecare.com www.yoonhangkim.com

I recently saw a patient with neuropathy of the feet unable to walk barefoot without pain. Patient came seeking relief from the pain. After using anti-inflammatory protocol, patient feels pain has improved more than 60%. Patient is now able to walk barefoot without pain. Patient also was able to lower medication Lyrica from 75 mg BID to 50 mg BID. Functional medicine offers a personalized and holistic approach to neuropathy by focusing on identifying and addressing the root causes of the condition rather than just treating the symptoms. Neuropathy, which refers to nerve damage that can lead to pain, numbness, tingling, or weakness, may result from a variety of underlying issues such as diabetes, autoimmune diseases, infections, toxin exposure, or nutritional deficiencies. Here’s how functional medicine may approach the treatment of neuropathy: Root Cause Analysis The first step is to identify the underlying cause(s) of the neuropathy, which may include: Diabetes Inflammation Toxin Exposure Nutritional deficiencies Personalized Diet and Nutrition Anti-inflammatory diet Specific nutrient supplementation: Based on testing, supplements like alpha-lipoic acid, B vitamins, acetyl-L-carnitine, curcumin, and omega-3 fatty acids may be recommended to support nerve repair and function. Gut health optimization: Since the gut plays a key role in inflammation and nutrient absorption, gut health is often a focus. This may involve addressing dysbiosis, leaky gut, or food sensitivities Integrative Therapies Acupuncture: Can help reduce pain and improve nerve function. By focusing on the individual’s unique biology and addressing all possible underlying causes, functional medicine aims to not only alleviate neuropathy symptoms but also restore optimal nerve function and overall health.

I recently saw a type 2 diabetes patient who has been treated with conventional medical approach. In conventional medicine, management of diabetes often relies on medications like Metformin.  While initial treatments can be successful, most people require higher dose and eventually other medication(s).    Patient wanted a functional medicine approach or root cause treatment approach to reverse diabetes.  Because root cause of type 2 diabetes often involves elevated blood sugars as a natural consequence of underlying metabolic dysfunction, patient was given a specific diet aimed at reversing the metabolic dysfunction.   In one month, patient lost about 10 pounds of weight –also a contributor to metabolic dysfunction – and resulted in reduced Hemoglobin A1c level by 10 to 8.  More significantly, patient’s fasting blood sugar has dropped to 90’s which is normal level.   Because Hemoglobin A1 level reflects long-term blood sugar levels, further improvements in Hemoglobin A1c is very likely.   I feel grateful to see these improvements through services performed through Memorial Institute of Health & Healing at Memorial Hospital, Carthage, IL.  I am looking forward to continuing to support the patient and observing the improvements – which hopefully could include reversing his type II diabetes.