Expert Q&A

Lost 3 and a half kg in my first 3 days…is this normal while doing intermittent fasting: what to track and how to measure progress?

Understanding Rapid Early Losses on Intermittent Fasting and Tirzepatide

Losing 3.5 kg in your first three days while starting intermittent fasting alongside low-dose tirzepatide is completely normal and expected in the 30-Week Tirzepatide Reset protocol. This initial drop is mostly water weight, reduced inflammation, and glycogen depletion rather than pure fat. When you cut grains, lectins, and ultra-processed carbs, your body sheds stored fluid quickly—often 2-4 kg in the first week. The medication further blunts hunger signals, making intermittent fasting easier from day one. In our Nashville clinic, nearly every patient sees 2.5-5 kg drop in the opening 72-96 hours when they follow the exact lectin-free low-carb plan from my book.

What to Track: Move Beyond the Scale

The scale can mislead, especially during hormonal shifts common in the 45-54 age group. Instead, use these four daily metrics that actually predict long-term success in the 30-Week Tirzepatide Reset. First, measure waist circumference at the navel—aim for 1-2 cm loss per week. Second, track energy levels and sleep quality on a 1-10 scale; rising scores signal improving metabolic freedom. Third, monitor how clothes fit and take weekly progress photos in the same lighting. Fourth, request baseline labs (fasting insulin, A1C, CRP, liver enzymes) and recheck at week 10. These non-scale victories matter more than kilograms because they reflect reduced joint pain, better blood pressure control, and reversing insulin resistance.

How the 30-Week Tirzepatide Reset Structures Sustainable Progress

Our protocol uses three 70-day cycles with smart low-dose tirzepatide cycling, never relying on medication alone. You eat 221 lectin-free recipes that eliminate the modern toxins driving hormonal weight gain. Add Japanese-style walking intervals (10 minutes after each meal), red light therapy sessions, and our targeted Detox Drops to accelerate real fat loss while protecting muscle. By week 4 most patients shift from rapid water loss to steady 0.5-1 kg of fat loss per week. The 69 Transformation Steps give you a clear daily roadmap so you’re never guessing. This prevents the two biggest mistakes: depending solely on the drug and obsessing over daily scale readings.

Real Patient Outcomes and What Comes Next

Patients like John, who dropped 11 kg and normalized his A1C in 10 weeks while managing diabetes, followed this exact approach. The first three days are exciting but the real victory is maintaining results 18 months later through chaotic intermittent fasting and rebuilt hunger signals. Focus on consistency with the real-food plan rather than speed. If joint pain limits movement, start with 5-minute walks and build up—the protocol was built for busy, middle-income adults who’ve failed every diet before. True metabolic freedom means your body wants to stay at a healthy weight naturally, long after the medication cycle ends.

💬 What the Community Says

The community shows strong interest in early rapid losses on intermittent fasting combined with tirzepatide, with many 45-54 year olds reporting 2-5 kg drops in the first week and asking if it's "real" or just water. Most practitioners in forums note this is typical and encourage shifting focus to measurements and energy levels rather than daily weigh-ins. A common debate centers on sustainability—some share regain stories after stopping medication without changing diet, while others following lectin-free or low-carb plans describe better success and fewer side effects. Beginners often feel overwhelmed by conflicting advice on tracking apps versus simple tape measures, and many express relief at hearing joint pain improves with reduced inflammation. Experiences vary on insurance coverage frustrations, but consistent praise goes to protocols that include detox support and walking routines over complex meal preps. A vocal minority worries about muscle loss, prompting frequent questions about body composition tracking.
Clark, R. (2026). Lost 3 and a half kg in my first 3 days…is this normal while doing intermittent . *CFP Weight Loss*. https://ask.cfpweightloss.com/ask/lost-3-and-a-half-kg-in-my-first-3-days-is-this-normal-while-doing-intermittent-fasting-what-to-track-and-how-to-measure-progress
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
▸ When the fatigue is real: how to talk to your doctor about this for people with insulin resistance? ▸ How many were first diagnosed with OCD if you're on a GLP-1 like semaglutide or tirzepatide on a low-carb or ketogenic diet? ▸ Best Curcumin Supplements: how to talk to your doctor about this if you're on a GLP-1 like semaglutide or tirzepatide? 📖 Refined Carbohydrates — Processed sugars and flours that strip the body of nutrients while driving the hormonal chaos responsible for the modern… ▸ 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? ▸ Were any of you guys fans of Journey? How big were they — what the research actually says? ▸ What can I ask for if estrodiol cream remains in shortage? Newly prescribed-should I even start if I can't refill next month — how a functional medicine approach differs — what the research actually says? ▸ Making me super tired and in a dreamy, chill, ready for a nap state for most of the day and its effect on metabolism and insulin levels for long-term maintenance (not just short-term)? ▸ LDN is changing my life, will this last: best practices and common mistakes to avoid for people with insulin resistance? 📖 Smart Cycling — The strategic alternating of medication doses with planned 'off' periods to prevent receptor desensitization and ensure … ▸ Has anyone felt better taking antidepressants instead of hrt — evidence-based answer for CFP patients — what certified coaches recommend? ▸ What can I ask for if estrodiol cream remains in shortage? Newly prescribed-should I even start if I can't refill next month — how a functional medicine approach differs 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 ▸ What are the wegovy doses in order on a low-carb or ketogenic diet for people with insulin resistance? ▸ 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? ▸ Does okra water actually help gut issues: what to track and how to measure progress — what certified coaches recommend? 📖 Tirzepatide — A dual-acting medication targeting both GLP-1 and GIP receptors, providing a more comprehensive metabolic signal than si… ▸ 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? ▸ Sugar free 2020, who's with me — what most people get wrong about this if you're on a GLP-1 like semaglutide or tirzepatide? ▸ Compression socks. Worth it? Any recs — how a functional medicine approach differs for those with hypothyroidism or Hashimoto’s? ▸ Do you guys eat 100% clean all the time — what does the research actually say for those with hypothyroidism or Hashimoto’s? 📖 Muscle Sarcopenia — The dangerous loss of lean muscle mass often seen in traditional 'crash diets' or high-dose GLP-1 use, which we combat t… ▸ Do yall ever daydream of who you were before your diagnosis when you have PCOS or hormonal imbalances if you're on a GLP-1 like semaglutide or tirzepatide? 📗 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 do you handle social settings and conversations with other people — what does the research actually say on a low-carb or ketogenic diet? ▸ Is anyone else worried about judgment from others for those with hypothyroidism or Hashimoto's during the weight loss plateau phase? ▸ What foods to stock for overnight guest — evidence-based answer for CFP patients: what to track and how to measure progress? ▸ If a random dance partner app existed .. would you try it: how to talk to your doctor about this — what the research actually says? ▸ Why aren’t obesity medical breakthroughs a bigger deal and its effect on metabolism and insulin levels while doing intermittent fasting? ▸ Crust check 🔥 ribeye done right for long-term maintenance (not just short-term)? 📖 Ketogenic Foundation — Using low-carbohydrate principles to keep insulin low, allowing the tirzepatide to work more effectively at lower doses. ▸ Traveling with IBS-D to a 5-day conference in San Diego: how do you manage food — what most people get wrong about this during the weight loss plateau phase? ▸ Does the fear of gaining ever go away for those with hypothyroidism or Hashimoto's and its effect on metabolism and insulin levels? ▸ Who still goes to steeplechase — what do certified weight loss coaches recommend for long-term maintenance (not just short-term)? ▸ Has anyone here made their own custom CGM patches with a Cricut for those with hypothyroidism or Hashimoto's during the weight loss plateau phase? 📗 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? 📖 GIP (Gastric Inhibitory Polypeptide) — A hormone that, when combined with GLP-1, enhances the body’s ability to break down fat and manage blood sugar levels mo… ▸ Is it just me or is Hashimoto’s greatly underrepresented on a low-carb or ketogenic diet — what the research actually says? ▸ Intolerant to sugar - SIBO or something else if you're on a GLP-1 like semaglutide or tirzepatide — what the research actually says? ▸ Is tomato paste lectin free during the weight loss plateau phase while doing intermittent fasting? ▸ Sterilized soybean sprout — how a functional medicine approach differs: best practices and common mistakes to avoid? ▸ LDN is changing my life, will this last: best practices and common mistakes to avoid: what to track and how to measure progress? 📖 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… ▸ What to do if you have to eat late dinners?? How to process the dinner quicker so I'm not burping all night long while doing intermittent fasting: what to track and how to measure progress? ▸ 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? 📗 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 ▸ 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? 📖 Bio-Individuality — The understanding that every patient’s metabolic journey is unique, requiring a personalized approach to dosing and diet… ▸ When you want something sweet but still try to keep things somewhat low-carb and how it connects to gut health and inflammation if you're on a GLP-1 like semaglutide or tirzepatide? ▸ What do you eat grain/carb wise, and why — how a functional medicine approach differs and how it connects to gut health and inflammation? ▸ 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? ▸ Should I be worried yet, been sitting for 5 days no movement while doing intermittent fasting: best practices and common mistakes to avoid? 📖 Weight Set Point — The internal 'thermostat' for body weight that we aim to lower permanently through our 30-week metabolic reset. ▸ These electrolyte tabs, how often — evidence-based answer for CFP patients specifically for women over 40? ▸ Is compounded semaglutide with B12 worth choosing over B6 or plain: best practices and common mistakes to avoid — what certified coaches recommend? ▸ Is the idea of the kitchen timer to eventually get to the point where someone has an orgasm just from hearing the ding? Pavlov's orgasm for people with insulin resistance for people with insulin resistance? 📖 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… 📗 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 ▸ Omnipod. Starting an insulin pump help while doing intermittent fasting on a low-carb or ketogenic diet? ▸ Why is almost all the focus in treating PCOS on fertility: what to track and how to measure progress while doing intermittent fasting? ▸ How do you deal with traveling when you're on a peptide protocol specifically for women over 40 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 — what does the research actually say specifically for women over 40? 📖 CICO (Calories In, Calories Out) — An outdated model of weight loss that ignores the role of hormones; we challenge this by focusing on food quality and ho… ▸ Can you take vitamin D with a tbsp of oil on an extended water fast for people with insulin resistance: best practices and common mistakes to avoid? ▸ I am on my second week of mounjaro (2.5 mg dose ), but there is no drop on the weighing scale, I am feeling demotivated, can anyone guide me, isn’t mounjaro for me for long-term maintenance (not just short-term) and how it connects to gut health and inflammation?