Expert Q&A

What I learned in 70 days added-sugar-free on a low-carb or ketogenic diet while doing intermittent fasting?

The First 14 Days: Breaking the Sugar Addiction Cycle

In the opening two weeks of my 70-day added-sugar-free experiment on a low-carb ketogenic diet paired with intermittent fasting, the biggest revelation was how deeply sugar controlled my hunger signals. Headaches, fatigue, and intense cravings hit hard around days 3-5 as my body shifted from burning glucose to ketones. Using the exact lectin-free meal plans from my book The 30-Week Tirzepatide Reset, I eliminated grains, lectins, and ultra-processed carbs. This removed the inflammatory triggers that had sabotaged past attempts. By day 10, energy stabilized, and I no longer needed snacks between meals. For beginners aged 45-54 battling hormonal changes and joint pain, this phase proves your metabolism can adapt faster than you think when you follow a structured 70-day cycle.

Weeks 3-6: Metabolic Freedom and Non-Scale Victories

By week three, the mental fog lifted completely. My intermittent fasting window expanded naturally to 16:8 without force, aligning perfectly with the chaotic fasting we teach in maintenance phases. Blood sugar readings dropped 25-30 points on average, easing diabetes and blood pressure management. I tracked body composition instead of the scale and noticed joint pain decreasing by 40% after consistent Japanese-style walking intervals—just 20 minutes daily. The protocol's Detox Drops supported toxin release, preventing the plateaus that plague most low-carb attempts. Patients in our Nashville clinic report the same: clothing fits better, sleep improves, and inflammation markers fall even before major weight drops. This is where the mindset shift happens—from fearing hunger to embracing metabolic freedom.

Weeks 7-10: Sustainable Habits and Hormone Reset

Entering the final stretch, I realized true success isn't about willpower but rebuilding hypothalamic function. Following the 69 Transformation Steps, I incorporated red light therapy sessions three times weekly, which accelerated fat loss around the midsection by enhancing mitochondrial efficiency. My combined protocol—low-dose tirzepatide cycling from The 30-Week Tirzepatide Reset, 221 lectin-free recipes, and targeted supplements—prevented the rebound so common after quick-fix diets. Energy soared, mood stabilized despite perimenopausal shifts, and I lost 18 pounds of fat while preserving muscle. Most importantly, I broke the cycle of failed diets by focusing on root causes like insulin resistance and toxin burden rather than calorie counting.

Key Takeaways You Can Apply Today

The core lesson: removing added sugars and lectins while cycling intermittent fasting restores your body's natural regulation. Start with a 70-day commitment using real foods only—no complicated schedules needed. Walk daily, track non-scale victories, and layer in smart tools like our Blue Hunger Drops if cravings persist. This approach has helped hundreds lose 30-90 pounds without insurance-covered programs or gym time. You don't need perfect conditions; you need the right system. The freedom you gain lasts long after the 70 days end.

💬 What the Community Says

Users in online forums share mixed but largely positive experiences with 70-day sugar-free low-carb or ketogenic trials alongside intermittent fasting. Many in their late 40s to mid-50s report initial struggles with keto flu and irritability, yet most note improved energy, reduced joint discomfort, and easier blood sugar control after week three. A common debate centers on sustainability—some praise the metabolic reset and non-scale wins like better sleep and looser clothes, while others lament social challenges or fears of rebound weight once fasting windows relax. Beginners often echo frustration with conflicting advice but appreciate structured lectin-free plans that simplify shopping. A vocal minority debates pairing these with medications like tirzepatide, with lived stories highlighting 15-30 pound losses and fewer diabetes meds, though insurance barriers and time constraints remain frequent pain points. Overall, the community values real-food focus over perfection, with many seeking maintenance strategies to avoid yo-yo patterns.
Cite this answer
Clark, R. (2026). What I learned in 70 days added-sugar-free on a low-carb or ketogenic diet while. *CFP Weight Loss*. https://ask.cfpweightloss.com/ask/what-i-learned-in-70-days-added-sugar-free-on-a-low-carb-or-ketogenic-diet-while-doing-intermittent-fasting
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
▸ What is the connection between I reduced my IR from 15.5 to 4 in 3 months when you have PCOS or hormonal imbalances? ▸ Has anyone stopped HRT and then restarted it for people with insulin resistance — what certified coaches recommend? ▸ When you get your microdose calculations wrong for the Monday morning meeting for people with insulin resistance during the weight loss plateau phase? 📖 Phase 2: Aggressive Loss — A 40-day window of focused fat loss supported by low-dose medication and a specific lectin-free, low-carb nutritional fr… ▸ Do any of you feel like you almost had to become your own doctor and have to do an insane amount of research on your own and its effect on metabolism and insulin levels and how it connects to gut health and inflammation? ▸ Anyone here have any experience with SIBO and Keto for people with insulin resistance during the weight loss plateau phase? ▸ Did an ultrasound and i saw two comments from the result. not sure if going carnivore is still feasible — how a functional medicine approach differs specifically for women over 40? ▸ My friends stopped being impressed by my weight loss ages ago. I just reached my goal weight, would you cheer for me in their place: what to track and how to measure progress when you have PCOS or hormonal imbalances? ▸ Anyone else feel this way and the role of cortisol and stress hormones for those with hypothyroidism or Hashimoto’s? 📗 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 specifically for women over 40? ▸ Why does keto hurt my stomach 😞 for people with insulin resistance and its effect on metabolism and insulin levels? 📖 One Box Protocol — A revolutionary approach where we stretch one 60 mg box of tirzepatide across three metabolic phases, prioritizing long-… ▸ A Switch from HRT to Birth Control: how to talk to your doctor about this when you have PCOS or hormonal imbalances? ▸ Depressive symptoms from non-stick air fryer — what do certified weight loss coaches recommend if you're on a GLP-1 like semaglutide or tirzepatide? ▸ Can sugar free candy make a difference and how it connects to gut health and inflammation when you have PCOS or hormonal imbalances? ▸ Post menopausal bleeding — what certified coaches recommend? 📖 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 anyone have ant literature or knowledge on autophagy and loose skin for long-term maintenance (not just short-term): what to track and how to measure progress? ▸ How good is it if I still drink (sugar free) soda for those with hypothyroidism or Hashimoto's if you're on a GLP-1 like semaglutide or tirzepatide? ▸ Have you noticed skin improvements on Paleo specifically for women over 40 — what certified coaches recommend? ▸ How good is it if I still drink (sugar free) soda for those with hypothyroidism or Hashimoto's and how it connects to gut health and inflammation? 📗 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 ▸ 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? ▸ Why your food noise comes back for those with hypothyroidism or Hashimoto's and how it connects to gut health and inflammation? ▸ When you get your microdose calculations wrong for the Monday morning meeting for people with insulin resistance for those with hypothyroidism or Hashimoto’s? 📖 Lectin-Free Living — Eliminating inflammatory plant proteins that damage the gut lining and trigger the autoimmune responses that often stall… ▸ Anybody else wake up after 5-6 hours because their lower back starts hurting if you're on a GLP-1 like semaglutide or tirzepatide and how it connects to gut health and inflammation? ▸ How much weight do you give to mechanism vs results when evaluating peptides — what do certified weight loss coaches recommend and its effect on metabolism and insulin levels? ▸ What is Adiponectin? How does it affect my weight loss journey? What can I do to naturally increase it? Help please. ▸ LDN is changing my life, will this last — what do certified weight loss coaches recommend 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? 📗 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 ▸ 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? ▸ How does has anyone reversed insulin resistance without medication on a GLP-1 drug and how it connects to gut health and inflammation? 📖 Refined Carbohydrates — Processed sugars and flours that strip the body of nutrients while driving the hormonal chaos responsible for the modern… ▸ How to induce autophagy without fasting for a long time — what do certified weight loss coaches recommend on a low-carb or ketogenic diet? ▸ Been invited for Easter dinner when you have PCOS or hormonal imbalances — what the research actually says? ▸ 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 and the role of cortisol and stress hormones — what the research actually says? ▸ How did I not get a heads up? I now make it my goal to help, support and inform others heading towards menooause and its effect on metabolism and insulin levels: what to track and how to measure progress? ▸ One Medical for Lilly Direct on a low-carb or ketogenic diet during the weight loss plateau phase? ▸ Thoughts about these together during the weight loss plateau phase specifically for women over 40? 📖 Maintenance Phase — The final 28 days of our 70-day cycle where we stabilize the new weight and solidify the metabolic habits that prevent f… ▸ Anyone here have any experience with SIBO and Keto for people with insulin resistance for those with hypothyroidism or Hashimoto’s? ▸ Anybody else feel like this — what does the research actually say 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 ▸ Body shops that work on cars older than 10+ years old for those with hypothyroidism or Hashimoto’s? ▸ Been going out with this girl and I think it’s destroyed my microbiome for people with insulin resistance when you have PCOS or hormonal imbalances? ▸ Should I be concerned over 457 Total Cholesterol and 369 LDL while doing intermittent fasting: best practices and common mistakes to avoid? ▸ 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)? ▸ Can Maintenance Phase do an episode about pregnancy weight gain — what do certified weight loss coaches recommend if you're on a GLP-1 like semaglutide or tirzepatide? 📖 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… ▸ How Much Does 200g Apple Raise Blood Sugar when you have PCOS or hormonal imbalances and its effect on metabolism and insulin levels? ▸ Will doing omad 2-3 times a week get rid of it or reduce loose skin? I'm in my 20s if you're on a GLP-1 like semaglutide or tirzepatide and its effect on metabolism and insulin levels? ▸ What I learned in 70 days added-sugar-free on a low-carb or ketogenic diet 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 ▸ 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? ▸ I lost 100#s using cutting calories and exercising, 10 to 15,000 steps, and I soon plateaued and I was so hungry. ▸ Anyone worried about the FDA crackdown — what most people get wrong about this: best practices and common mistakes to avoid? 📖 Metabolic Reset — The process of retraining your body to utilize stored fat for fuel and regulating hunger hormones so you can maintain yo… ▸ Why does keto hurt my stomach 😞 for people with insulin resistance and how it connects to gut health and inflammation? ▸ Anyone worried about the FDA crackdown — what most people get wrong about this while doing intermittent fasting? ▸ 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?