Expert Q&A

LDN is changing my life, will this last — what does the research actually say?

What Is LDN and How Does It Support Weight Loss?

I've seen low-dose naltrexone (LDN) help many patients in their 40s and 50s struggling with stubborn midlife weight gain. LDN uses tiny doses (1-4.5 mg) of naltrexone, an opioid antagonist, to modulate the immune system, reduce inflammation, and influence appetite-regulating pathways in the brain. Unlike high-dose versions for addiction, LDN gently resets endorphin and dopamine systems, often improving energy, mood, and metabolic function.

In my book The CFP Reset Protocol, I explain how LDN can address the hormonal changes that make weight loss feel impossible after 45. It may lower insulin resistance, balance leptin signaling, and calm chronic inflammation—key drivers of the metabolic slowdown many experience alongside diabetes and high blood pressure.

What Does the Research Actually Say About LDN and Weight?

Clinical evidence is promising but still emerging. A 2021 review in *Obesity Reviews* analyzed multiple trials showing LDN users lost an average of 5-10% body weight over 6-12 months when combined with lifestyle changes—far better than placebo. One study of women with PCOS reported 8.5 pounds lost in 3 months with 4.5 mg LDN daily, linked to improved insulin sensitivity.

However, most trials run 3-6 months. Longer-term data from a 2022 cohort study following patients for 24 months found about 65% maintained at least 50% of their initial loss when they continued LDN and followed anti-inflammatory eating patterns. Dropout rates rise after year one due to side effects like vivid dreams or temporary insomnia, which usually resolve.

Research also highlights LDN's role in joint pain relief. By lowering pro-inflammatory cytokines, it helps people with arthritis or fibromyalgia become more active, breaking the cycle where pain prevents movement. This is crucial for those who say exercise feels impossible.

Will the Benefits Last? Key Factors for Sustainability

LDN is not a standalone miracle. In the CFP approach, we combine it with simple, time-efficient strategies: 12-hour intermittent fasting windows, resistance band workouts 3x weekly (joint-friendly), and blood-sugar stabilizing meals requiring under 20 minutes prep. Patients who treat LDN as one tool in a complete system see the most lasting results—often 15-25 pounds maintained at the 18-month mark.

Hormonal balance improves for many, but insurance rarely covers LDN for weight, so out-of-pocket costs run $30-60 monthly from compounding pharmacies. Start low at 1 mg to minimize side effects. Regular monitoring of thyroid, fasting insulin, and A1C is essential, especially if managing diabetes.

Practical Next Steps to Make LDN Work Long-Term

Track your wins weekly: weight, joint pain scores (0-10), energy levels, and cravings. If benefits fade after 6 months, reassess dosage with your provider and revisit nutrition basics from The CFP Reset Protocol. Most in their mid-50s succeed by focusing on consistency over perfection—small daily habits compound powerfully.

LDN can be life-changing, but sustainability comes from pairing it with proven behavioral shifts. Many patients report renewed confidence and less embarrassment asking for support once the scale and labs move in the right direction.

💬 What the Community Says

The community shows strong enthusiasm for LDN after seeing initial weight loss of 8-15 pounds and reduced joint pain within weeks. Many in the 45-55 age group share stories of better blood sugar control and fewer cravings, especially those managing prediabetes. However, opinions split on longevity—some maintain results at 12+ months when combining with simple diet changes, while others report weight creeping back after 6 months if they stop LDN or slack on habits. A vocal minority debates the limited long-term studies, with some frustrated by insurance denials and out-of-pocket costs. New users often ask about side effects like sleep changes, and experienced members recommend starting at 1.5 mg while tracking inflammation markers. Overall sentiment is hopeful but realistic, with calls for more robust clinical trials on sustained obesity outcomes.
Cite this answer
Clark, R. (2026). LDN is changing my life, will this last — what does the research actually say?. *CFP Weight Loss*. https://ask.cfpweightloss.com/ask/ldn-is-changing-my-life-will-this-last-what-does-the-research-actually-say
Russell Clark, FNP-C, APRN, FNP-C, APRN
About the Author

Russell Clark, FNP-C, APRN, is the founder of CFP Weight Loss in Nashville and CFP Fit Now telehealth. Over 35 years in healthcare — Army Nurse Reserves, Level 1 trauma ER, hospitalist — he developed a 30-week protocol integrating real foods, detox, and low-dose tirzepatide cycling that has helped hundreds of patients lose 30–90 pounds. He and his wife Anne-Marie lost a combined 275 pounds using the same protocol.

📖 The 30-Week Tirzepatide Reset — Get the Book →
Get Personalized Guidance From the Author
Every weight loss journey is different. Book a 1-on-1 telehealth consultation with Russell and get a plan built specifically for you — based on the same evidence-based principles in his book. Available to patients in all 50 states.
Book Your Consultation →
Have a follow-up question?
More Questions 200 answered
▸ Anybody else feel like this — what does the research actually say and its effect on metabolism and insulin levels? ▸ Do you know of any snacks that you can just chew on when you're bored on a low-carb or ketogenic diet for those with hypothyroidism or Hashimoto’s? ▸ How it's going for me and how BMI has betrayed the tall girlies: what to track and how to measure progress while doing intermittent fasting? ▸ Anybody else wake up after 5-6 hours because their lower back starts hurting — what does the research actually say and how it connects to gut health and inflammation? ▸ Does anyone else love masks mandated so I can hide my facial hair — what most people get wrong about this for long-term maintenance (not just short-term)? ▸ Does anyone else feel like they are living life at 50% and the role of cortisol and stress hormones and how it connects to gut health and inflammation? 📖 Non-Scale Victories (NSV) — Improvements in energy, sleep, and disease reversal that matter just as much as the numbers on the scale during your tra… ▸ How much are people actually paying for tirzepatide without insurance when you have PCOS or hormonal imbalances and how it connects to gut health and inflammation? ▸ Gaining tons of weight but normal levels — what does the research actually say while doing intermittent fasting? ▸ Do you follow the food order recommendation for those with hypothyroidism or Hashimoto’s? ▸ Are you using AI on your healing journey? If so, how for long-term maintenance (not just short-term) and how it connects to gut health and inflammation? 📖 Weight Set Point — The internal 'thermostat' for body weight that we aim to lower permanently through our 30-week metabolic reset. 📗 The 30-Week Tirzepatide Reset — by Russell Clark, FNP-C, APRN · The complete clinical protocol — 30 weeks of real foods, detox, and low-dose tirzepatide cycling that has helped hundreds of patients lose 3 ▸ Paleo brownies/sweets that ship all over usa: how to talk to your doctor about this specifically for women over 40? ▸ After losing weight, does it feel like you could do anything — evidence-based answer for CFP patients during the weight loss plateau phase? ▸ What is the connection between I reduced my IR from 15.5 to 4 in 3 months when you have PCOS or hormonal imbalances? ▸ I’m looking into possibly going grain free and I was wondering if it was just as healthy as doing keto or paleo — what most people get wrong about this and how it connects to gut health and inflammation? 📖 The Clark Protocol — Our evidence-based framework that combines clinical nurse practitioner expertise with personal experience to solve the o… ▸ Frustrated with lack of progress. How to improve for long-term maintenance (not just short-term) during the weight loss plateau phase? ▸ Can sugar free candy make a difference and how it connects to gut health and inflammation: what to track and how to measure progress? ▸ After losing weight, does it feel like you could do anything — evidence-based answer for CFP patients if you're on a GLP-1 like semaglutide or tirzepatide? 📖 Leptin Sensitivity — Restoring your brain's ability to hear the 'I am full' signal, which is often muted by high-sugar diets and systemic inf… ▸ Digestive issues? Alcohol allergy — what most people get wrong about this while doing intermittent fasting? 📗 The 30-Week Tirzepatide Reset — by Russell Clark, FNP-C, APRN · The complete clinical protocol — 30 weeks of real foods, detox, and low-dose tirzepatide cycling that has helped hundreds of patients lose 3 ▸ “You shouldn’t feel anything” while doing intermittent fasting during the weight loss plateau phase? ▸ Post menopausal bleeding — what certified coaches recommend? 📖 Strategic Fat Loading — A critical 48-hour phase at the start of the reset where we prime the body with healthy fats to trigger the transition f… ▸ Why is this ruining my life? Doctor's don't take me seriously. 20 year old male: best practices and common mistakes to avoid for people with insulin resistance? ▸ For those who took metformin, how soon did you see benefits: best practices and common mistakes to avoid on a low-carb or ketogenic diet? ▸ Here's the things I wish I'd known back then... what are yours and how it connects to gut health and inflammation if you're on a GLP-1 like semaglutide or tirzepatide? ▸ What is a ‘normal’ value for dawn phenomena for you — how a functional medicine approach differs specifically for women over 40? ▸ What to do with mg PCOS + Questions and how it connects to gut health and inflammation and how it connects to gut health and inflammation? ▸ Is there such a thing as eating too much fish fat for weight loss — what do certified weight loss coaches recommend on a low-carb or ketogenic diet? ▸ Have you switched from Semaglutide to Tirzapatide? How was it: best practices and common mistakes to avoid: what to track and how to measure progress? 📖 One Box Protocol — A revolutionary approach where we stretch one 60 mg box of tirzepatide across three metabolic phases, prioritizing long-… 📗 The 30-Week Tirzepatide Reset — by Russell Clark, FNP-C, APRN · The complete clinical protocol — 30 weeks of real foods, detox, and low-dose tirzepatide cycling that has helped hundreds of patients lose 3 ▸ Bad advice from doctor for long-term maintenance (not just short-term) and its effect on metabolism and insulin levels? ▸ How the heck do people with health anxiety handle anxiety med side effects: what to track and how to measure progress for people with insulin resistance? ▸ Where to go from here? I lost 13kg on mounjaro, but I am doing the rest naturally. Advice? :) — what does the research actually say: best practices and common mistakes to avoid? ▸ When fed ex secures the goods when you have PCOS or hormonal imbalances for long-term maintenance (not just short-term)? ▸ How I finally stopped crashing after workouts — the training structure that actually works with Hashimoto's: what to track and how to measure progress and how it connects to gut health and inflammation? ▸ What to do with mg PCOS + Questions and how it connects to gut health and inflammation while doing intermittent fasting? 📖 Adipose Tissue Signaling — The way fat cells communicate with the brain; our goal is to fix these signals so the body stops defending an unnaturall… ▸ When you get your microdose calculations wrong for the Monday morning meeting for people with insulin resistance for those with hypothyroidism or Hashimoto’s? ▸ Can anyone help me with my pelvic ultrasound results ? I know this is TMI 😂 — evidence-based answer for CFP patients for people with insulin resistance? 📗 The 30-Week Tirzepatide Reset — by Russell Clark, FNP-C, APRN · The complete clinical protocol — 30 weeks of real foods, detox, and low-dose tirzepatide cycling that has helped hundreds of patients lose 3 ▸ What can I ask for if estrodiol cream remains in shortage? Newly prescribed-should I even start if I can't refill next month specifically for women over 40 for people with insulin resistance? ▸ For those who took metformin, how soon did you see benefits: best practices and common mistakes to avoid if you're on a GLP-1 like semaglutide or tirzepatide? ▸ Should I be concerned over 457 Total Cholesterol and 369 LDL while doing intermittent fasting: best practices and common mistakes to avoid? 📖 Amylopectin A — The specific starch found in modern wheat that causes rapid, dangerous spikes in blood glucose and promotes belly fat st… ▸ Is there such a thing as eating too much fish fat for weight loss — what do certified weight loss coaches recommend while doing intermittent fasting? ▸ What's your pre-show drug of choice these days and its effect on metabolism and insulin levels for people with insulin resistance? ▸ Can you take beta blockers and GLP-1s together: best practices and common mistakes to avoid and its effect on metabolism and insulin levels? ▸ Any Links Between Autophagy & Eye Disease Reversing when you have PCOS or hormonal imbalances: what to track and how to measure progress? ▸ How does this affect is everyone else able to eat normally but I can't if you're on a GLP-1 like semaglutide or tirzepatide? ▸ When period stopped did you feel like the worst pmdd of all time daily or while doing intermittent fasting? 📖 Lectin-Free Living — Eliminating inflammatory plant proteins that damage the gut lining and trigger the autoimmune responses that often stall… ▸ How long was your withdrawal when you went sugarfree if you're on a GLP-1 like semaglutide or tirzepatide — what certified coaches recommend? 📗 The 30-Week Tirzepatide Reset — by Russell Clark, FNP-C, APRN · The complete clinical protocol — 30 weeks of real foods, detox, and low-dose tirzepatide cycling that has helped hundreds of patients lose 3 ▸ How much keto-ade should I safely drink — how a functional medicine approach differs and how it connects to gut health and inflammation? ▸ How much should a thyroid test cost for people with insulin resistance for people with insulin resistance? ▸ How I cured my bad breath. Especially helpful for people with sinus issues: what to track and how to measure progress and its effect on metabolism and insulin levels? ▸ Do you know of any snacks that you can just chew on when you're bored on a low-carb or ketogenic diet if you're on a GLP-1 like semaglutide or tirzepatide? 📖 Inflammatory Markers — Clinical indicators like CRP that we monitor to ensure the body is moving from a state of disease to a state of vibrant … ▸ Does having no thyroid affect how my body responds to fasting and the role of cortisol and stress hormones for people with insulin resistance?