Expert Q&A

How long have we known that diabetes can be cured by not eating any carbs? Can you guess on a low-carb or ketogenic diet for those with hypothyroidism or Hashimoto’s?

The Historical Roots of Carb Restriction for Diabetes

Physicians have recognized the power of carbohydrate elimination to manage and even reverse type 2 diabetes for over 150 years. In the 1860s, Dr. William Banting published his letter on corpulence, detailing how removing bread, sugar, and starches reversed his own obesity and metabolic symptoms. By the early 1900s, Dr. Frederick Allen’s starvation protocols and Dr. Elliott Joslin’s clinical work showed fasting and very-low-carb diets normalized blood glucose in diabetics. These findings predate insulin’s discovery in 1921. Modern validation arrived in the 1970s-80s with Dr. Robert Atkins and again in the 2000s through randomized trials demonstrating insulin resistance reversal, A1C drops of 1.5-2.0 points, and medication reduction within 12-16 weeks on ketogenic protocols.

Adapting Low-Carb and Ketogenic Diets for Hypothyroidism and Hashimoto’s

Patients with hypothyroidism or Hashimoto’s often fear restrictive diets will further suppress thyroid function. The truth is strategic low-carb eating can reduce autoimmune inflammation while supporting hormone conversion. In my book The 30-Week Tirzepatide Reset, we use a lectin-free, moderate-protein ketogenic template during the first 70-day cycle. This removes grains, nightshades, and processed carbs that trigger lectin inflammation and gut permeability—common drivers of Hashimoto’s flares. Typical starting macros are 20-40g net carbs, 1.2g protein per kg ideal body weight, and the remainder healthy fats from avocado, olive oil, and fatty fish.

Key safeguards include monitoring free T3, reverse T3, and TSH every 6-8 weeks. Many patients see improved energy and antibody reduction when combining this with our targeted Detox Drops and Japanese-style walking intervals. Avoid extreme long-term restriction below 20g carbs if thyroid labs decline; cycle in 50-75g carb days from approved vegetables during the reset’s maintenance phase.

Integrating Smart Tirzepatide Cycling for Lasting Metabolic Freedom

The biggest mistake is relying on medication alone. Our 30-week protocol cycles low-dose tirzepatide across three 70-day phases while rebuilding metabolic health through real-food meals from our 221-recipe guide. For a patient like John, who entered with A1C 7.8, 40 extra pounds, and concurrent hypothyroidism, the lectin-free plan plus weekly red light therapy dropped his A1C to 6.2 in ten weeks and normalized thyroid markers. He discontinued two diabetes medications and has maintained results for over two years using chaotic intermittent fasting.

Focus on non-scale victories: reduced joint pain, stable blood pressure, better sleep, and clothing fit. The 69 Transformation Steps provide a daily roadmap so beginners never feel overwhelmed. Sustainable success comes from restoring hypothalamic signaling and insulin sensitivity, not perpetual drug dependence.

Practical Starting Tips for Beginners

Begin with a 7-day prep phase eliminating all grains and sugars. Track body composition weekly rather than daily scale weight. Pair the diet with 20-minute daily walks, red light sessions, and our Blue Hunger Drops if needed. Consult your provider for thyroid medication adjustments. Thousands have lost 30-90 pounds and reversed metabolic disease following this exact system without insurance-covered programs or complex schedules.

💬 What the Community Says

The community shows strong interest in historical low-carb approaches for diabetes reversal, with many citing Banting’s 1860s work and recent studies confirming A1C improvements. Users with hypothyroidism or Hashimoto’s are divided: some report dramatic inflammation reduction and antibody drops on ketogenic diets within 8-12 weeks, while others describe initial TSH spikes or fatigue that resolved after adding targeted carbs or thyroid support. A vocal minority warns against very-low-carb long term without lab monitoring. Most appreciate protocols like the 30-Week Tirzepatide Reset that combine smart medication cycling, lectin-free meals, and simple habits. Beginners often share success stories of 25-50 pound losses alongside improved joint pain and energy, though insurance barriers and conflicting nutrition advice remain frequent frustrations. Lived experiences emphasize focusing on how one feels over the scale.
Clark, R. (2026). How long have we known that diabetes can be cured by not eating any carbs? Can y. *CFP Weight Loss*. https://ask.cfpweightloss.com/ask/how-long-have-we-known-that-diabetes-can-be-cured-by-not-eating-any-carbs-can-you-guess-on-a-low-carb-or-ketogenic-diet-for-those-with-hypothyroidism-or-hashimoto-s
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.

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
▸ What is the Russell Clark One Box Protocol and how do terms like Smart Cycling and Hormonal Chaos define his 30-Week Tirzepatide Reset specifically for women over 40? ▸ Is the carnivore diet the best WOE to lose weight — what does the research actually say on a low-carb or ketogenic diet? ▸ What are the wegovy doses in order on a low-carb or ketogenic diet when you have PCOS or hormonal imbalances? ▸ Is lime water (but sipped throughout the day) ok with autophagy — how a functional medicine approach differs for people with insulin resistance? ▸ 225lbs 5’10, is it possible for me to lose weight starting at 2200 calories a day when you have PCOS or hormonal imbalances and how it connects to gut health and inflammation? ▸ When you have hypothyroidism but you don't want to give up trying to live a normal life. 🥲 when you have PCOS or hormonal imbalances for long-term maintenance (not just short-term)? 📖 Metabolic Efficiency — The state where your body processes fuel cleanly and maintains high energy levels without the need for constant snacking… ▸ What is a super quick "Mix some of this in" to make coconut oil (purely in liquid form) taste ok to make it easy to consume: how to talk to your doctor about this during the weight loss plateau phase? ▸ Should I be worried yet, been sitting for 5 days no movement while doing intermittent fasting: best practices and common mistakes to avoid? 📗 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 ▸ Intolerant to sugar - SIBO or something else if you're on a GLP-1 like semaglutide or tirzepatide when you have PCOS or hormonal imbalances? ▸ Good calorie amount? Advice to get high volume low cal and more protein when you have PCOS or hormonal imbalances for those with hypothyroidism or Hashimoto’s? ▸ Does mental health predict diabetes as much as BMI? Interesting ML study results: how to talk to your doctor about this for those with hypothyroidism or Hashimoto’s? 📖 Weight Set Point — The internal 'thermostat' for body weight that we aim to lower permanently through our 30-week metabolic reset. ▸ Did L. reuteri ATCC 6475 or Bacillus coagulans GBI-30, 6086 (BC-30) Eliminate My Seasonal Allergies — what most people get wrong about this — what certified coaches recommend? ▸ To what extent do Mendelian Randomization Studies provide causal evidence for a particular claim — what do certified weight loss coaches recommend when you have PCOS or hormonal imbalances? ▸ What’s your favorite toothpaste for people with insulin resistance — what the research actually says? ▸ Good calorie amount? Advice to get high volume low cal and more protein when you have PCOS or hormonal imbalances — what the research actually says? 📖 Diabetes Reversal — The clinical goal of restoring normal blood sugar levels and insulin function, as seen in patients like John who no long… ▸ Tesamorelin - conflicting information online- can I keep powder vials in freezer? Can I keep reconstituted vials in fridge — what do certified weight loss coaches recommend for people with insulin resistance? ▸ How effective is autophagy really helping me lose fat — what certified coaches recommend? ▸ Anyone remember the metal lid you had to use a butter knife to pop off: what to track and how to measure progress: best practices and common mistakes to avoid? 📗 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 ▸ Does okra water actually help gut issues: what to track and how to measure progress — what certified coaches recommend? ▸ Omnipod. Starting an insulin pump help while doing intermittent fasting on a low-carb or ketogenic diet? ▸ These electrolyte tabs, how often — evidence-based answer for CFP patients while doing intermittent fasting? ▸ Do yall ever daydream of who you were before your diagnosis when you have PCOS or hormonal imbalances when you have PCOS or hormonal imbalances? 📖 Tirzepatide — A dual-acting medication targeting both GLP-1 and GIP receptors, providing a more comprehensive metabolic signal than si… ▸ Starting a 7 day water fast, any tips to keep hydrated on a low-carb or ketogenic diet: what to track and how to measure progress? ▸ How much protein should I eat if I weigh 280 pounds and want to cut a 100 pounds of fat off of my body? ▸ Thyroid tests all in range— but high calcium — how a functional medicine approach differs during the weight loss plateau phase? ▸ When do you know to go to the hospital specifically for women over 40? ▸ Can autophagy regenerate muscle during physically active prolonged fast and how it connects to gut health and inflammation and its effect on metabolism and insulin levels? 📖 Cellular Detox — The process of clearing out metabolic waste and reducing cellular stress to allow for more efficient energy production a… ▸ If a random dance partner app existed .. would you try it: how to talk to your doctor about this and its effect on metabolism and insulin levels? 📗 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 ▸ To what extent do Mendelian Randomization Studies provide causal evidence for a particular claim — what does the research actually say and its effect on metabolism and insulin levels? ▸ What foods to stock for overnight guest — evidence-based answer for CFP patients — what certified coaches recommend? 📖 One Box Protocol — A revolutionary approach where we stretch one 60 mg box of tirzepatide across three metabolic phases, prioritizing long-… ▸ How does chasing skinny ever get old for long-term results while doing intermittent fasting? ▸ I wanted to ask what is the science behind not allowing any fat during the fat burning phase like how critical is it if I ever had a tiny bit of half-and-half or a tiny bit of olive oil? Is it really do something to the body. ▸ What actually helps with the dryness when you have PCOS or hormonal imbalances while doing intermittent fasting? ▸ I have an iodine deficiency. Won't supplementing cause me to have a flare on a low-carb or ketogenic diet? ▸ What are the wegovy doses in order on a low-carb or ketogenic diet — what certified coaches recommend? 📖 Modern Wheat Dangers — The hidden threat in hybridized grains that causes gut inflammation and spikes blood sugar more aggressively than pure t… ▸ Im eating so well that I accidently put my body in ketosis and how it connects to gut health and inflammation: best practices and common mistakes to avoid? ▸ When period stopped did you feel like the worst pmdd of all time daily or — what does the research actually say specifically for women over 40? ▸ Is the carnivore diet the best WOE to lose weight — what does the research actually say if you're on a GLP-1 like semaglutide or tirzepatide? 📖 30-Week Tirzepatide Reset — Our signature protocol using a single 60 mg box of medication cycled over 30 weeks to achieve lasting metabolic transfor… 📗 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 are some things you loved from your childhood that you (virtually) never see/experience anymore during the weight loss plateau phase on a low-carb or ketogenic diet? ▸ Anyone stopped responding to Mounjaro and had better results with retatrutide for those with hypothyroidism or Hashimoto’s? ▸ Fitter or kidding myself: how to talk to your doctor about this if you're on a GLP-1 like semaglutide or tirzepatide? ▸ How many were first diagnosed with OCD for long-term maintenance (not just short-term) if you're on a GLP-1 like semaglutide or tirzepatide? 📖 Smart Cycling — The strategic alternating of medication doses with planned 'off' periods to prevent receptor desensitization and ensure … ▸ How does a 16 hour daily fast induce autophagy for men for long-term maintenance (not just short-term)? ▸ Were any of you guys fans of Journey? How big were they when you have PCOS or hormonal imbalances? ▸ How do you handle social settings and conversations with other people — what does the research actually say on a low-carb or ketogenic diet? ▸ Testosterone how long does it take to work while doing intermittent fasting if you're on a GLP-1 like semaglutide or tirzepatide? 📖 Lectin-Free Living — Eliminating inflammatory plant proteins that damage the gut lining and trigger the autoimmune responses that often stall… ▸ These electrolyte tabs, how often — evidence-based answer for CFP patients specifically for women over 40? 📗 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 ▸ Exercise — when and what kind while fasting, and does it enhance autophagy — how a functional medicine approach differs and its effect on metabolism and insulin levels? ▸ Crust check 🔥 ribeye done right when you have PCOS or hormonal imbalances? 📖 Tirzepatide Micro-Dosing — The practice of using the lowest effective dose to achieve results, minimizing side effects while maximizing the longevi… ▸ Difference between a 3 day and 5 day water fast for autophagy and the role of cortisol and stress hormones for people with insulin resistance?