Expert Q&A

How good is it if I still drink (sugar free) soda while doing intermittent fasting: what to track and how to measure progress?

The Impact of Sugar-Free Soda on Intermittent Fasting

Many patients ask if sugar-free soda is acceptable while following intermittent fasting within my 30-Week Tirzepatide Reset protocol. The short answer is it depends on your goals. Technically, zero-calorie sodas don't spike insulin or break a true fast for autophagy. However, artificial sweeteners like aspartame and sucralose can trigger cephalic phase insulin release, blunt hunger signals, and keep sweet cravings alive. In our Nashville clinic, we've seen this stall metabolic freedom for patients already battling insulin resistance from years of yo-yo dieting and hormonal changes.

During the initial 70-day cycles of low-dose tirzepatide cycling, I recommend eliminating diet sodas completely. Replace them with sparkling water, herbal teas, or our Blue Drops to manage hunger naturally. This aligns with the lectin-free low-carb diet that removes grains, lectins, and ultra-processed items. Once you reach maintenance and practice chaotic intermittent fasting, an occasional diet soda might fit without derailing progress, but most of my patients who achieve 30-90 pound losses report better energy and fewer cravings when they stay completely off them.

What to Track Beyond the Scale

Obsessing over the number on the scale is one of the two biggest mistakes I see. Instead, use the 69 Transformation Steps in "The 30-Week Tirzepatide Reset" to monitor real changes. Track waist circumference weekly—aim for 1-2 inches lost per month. Log daily energy levels, joint pain reduction, sleep quality, and how clothes fit. Blood work every 8-10 weeks should show improvements in A1C, fasting insulin, CRP for inflammation, and liver enzymes. Many patients managing diabetes and blood pressure see medications reduced by week 10.

Use a body-composition app to measure visceral fat loss. Note non-scale victories like walking 30 minutes Japanese-style without knee pain or fitting into old jeans. These metrics prove your metabolism is resetting far better than the scale alone.

How to Measure Progress on the Protocol

Progress on the 30-Week Tirzepatide Reset is measured through integrated tools. Combine weekly photos, measurements, and the app's body-fat percentage with symptom tracking. Expect 1-3 pounds of fat loss per week during active low-dose tirzepatide phases when paired with real foods, Detox Drops, red light therapy, and movement. In maintenance, chaotic intermittent fasting helps sustain results without constant restriction.

John, a 58-year-old with Type 2 diabetes, followed this exactly. His A1C dropped from 7.8 to 5.9, he lost 42 pounds, and his joint pain vanished within 20 weeks. He tracked everything in our system and now maintains naturally. Focus on metabolic health over quick fixes, and you'll break the cycle of failed diets for good.

Practical Steps to Replace Soda and Build Success

Start by swapping one soda daily with infused sparkling water and our targeted Drops. Follow the 221 lectin-free recipes for satisfying meals that keep you full during fasting windows. Add red light sessions 3-4 times weekly and daily walks. This complete system addresses root causes like toxin burden and broken hunger signals so your body naturally regulates weight. You don't need medication forever—strategic cycling plus real habits deliver the metabolic freedom my wife and I experienced after losing 275 pounds combined.

💬 What the Community Says

The community shows mixed experiences with sugar-free soda during intermittent fasting on tirzepatide protocols. Many in their late 40s to mid-50s report it helps them stick to fasting windows without feeling deprived, especially those overwhelmed by nutrition rules or managing blood sugar. Several mention no weight loss stalls when limiting to one per day, while others share stories of stalled progress, increased bloating, or renewed cravings that led them to quit sodas entirely. Beginners often debate artificial sweeteners' effects on insulin and gut health, with some citing personal lab improvements after removal. Non-scale victories like better energy and less joint pain dominate positive threads. A vocal minority insists any soda undermines metabolic reset goals from books like The 30-Week Tirzepatide Reset, while most appreciate practical tracking tips such as measurements, photos, and blood markers over scale weight alone. Insurance barriers and past diet failures make users value real-user stories of sustainable maintenance.
Cite this answer
Clark, R. (2026). How good is it if I still drink (sugar free) soda while doing intermittent fasti. *CFP Weight Loss*. https://ask.cfpweightloss.com/ask/how-good-is-it-if-i-still-drink-sugar-free-soda-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.

📖 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
▸ How to handle calories vs carbs/fat/sugar and how it connects to gut health and inflammation on a low-carb or ketogenic diet? ▸ 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? ▸ Fitter or kidding myself: how to talk to your doctor about this if you're on a GLP-1 like semaglutide or tirzepatide? ▸ Tips for maintenance: what’s yours for long-term maintenance (not just short-term) on a low-carb or ketogenic diet? ▸ Is it okay for teenagers to do longterm lowcarb/keto — evidence-based answer for CFP patients for those with hypothyroidism or Hashimoto’s? 📖 Autophagy — The body's natural 'housecleaning' process that occurs during fasting or low-insulin states, promoted during our mainten… ▸ When am I supposed to see a doctor, then and how it connects to gut health and inflammation specifically for women over 40? ▸ 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? ▸ 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? ▸ Sugar free 2020, who's with me — what most people get wrong about this: what to track and how to measure progress? ▸ 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? 📗 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 ▸ LDN is changing my life, will this last: best practices and common mistakes to avoid for people with insulin resistance? ▸ 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? 📖 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… ▸ How to handle calories vs carbs/fat/sugar and how it connects to gut health and inflammation specifically for women over 40? ▸ Does okra water actually help gut issues: what to track and how to measure progress — what certified coaches recommend? ▸ 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? ▸ 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: best practices and common mistakes to avoid? ▸ Can you take vitamin D with a tbsp of oil on an extended water fast for people with insulin resistance during the weight loss plateau phase? ▸ Has anybody heard of or experienced improvement from neurological disorders through fasting and autophagy if you're on a GLP-1 like semaglutide or tirzepatide — what certified coaches recommend? ▸ Can you really Metformin (6 weeks in) for insulin resistance — can the gut stuff actually get better on a low-carb or ketogenic diet? 📖 Caloric Deficit Myth — The false belief that weight loss is purely 'math'; we focus on hormonal signaling rather than just counting calories to… 📗 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 tomato paste lectin free during the weight loss plateau phase while doing intermittent fasting? ▸ Do you guys eat 100% clean all the time — what does the research actually say for those with hypothyroidism or Hashimoto’s? ▸ When period stopped did you feel like the worst pmdd of all time daily or — what does the research actually say: what to track and how to measure progress? 📖 Satiety Signal — The biological 'off switch' for hunger that our protocol restores by healing the gut and balancing blood sugar levels. ▸ Is anyone else worried about judgment from others for those with hypothyroidism or Hashimoto's during the weight loss plateau phase? ▸ Got diagnosed today, where do i go from here — what do certified weight loss coaches recommend: best practices and common mistakes to avoid? ▸ If a random dance partner app existed .. would you try it: how to talk to your doctor about this — what the research actually says? ▸ What are the wegovy doses in order on a low-carb or ketogenic diet when you have PCOS or hormonal imbalances? ▸ Best Curcumin Supplements: how to talk to your doctor about this 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 ▸ Will eating meintenance calories make me lose weight for those with hypothyroidism or Hashimoto's when you have PCOS or hormonal imbalances? ▸ What is your immediate go to for some relief during ha — what most people get wrong about this — what certified coaches recommend? 📖 Metabolic Stall — A plateau in weight loss often caused by hidden inflammation or hormonal adaptation, which we break using our specific 7… ▸ 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? ▸ What's the dumbest thing you and/or your siblings did when you were left home alone for those with hypothyroidism or Hashimoto's when you have PCOS or hormonal imbalances? ▸ Is it normal to lose weight then gain again when you have PCOS or hormonal imbalances for long-term maintenance (not just short-term)? ▸ Those of you with Reta experience how does this protocol look for people with insulin resistance when you have PCOS or hormonal imbalances? ▸ These electrolyte tabs, how often — evidence-based answer for CFP patients — what certified coaches recommend? ▸ Lost weight not exactly willingly and everybody’s weird about it for long-term maintenance (not just short-term) 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 ▸ 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? 📖 Anti-Inflammatory Protocol — A way of eating that prioritizes whole foods and eliminates triggers to quiet the internal 'fire' that prevents fat cell… ▸ Why cant i lose weight and am gaining weight when you have PCOS or hormonal imbalances for those with hypothyroidism or Hashimoto’s? ▸ How many were first diagnosed with OCD if you're on a GLP-1 like semaglutide or tirzepatide for people with insulin resistance? ▸ 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) — what the research actually says? 📖 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… ▸ Coke Zero gave me heart palpitations: what to track and how to measure progress and how it connects to gut health and inflammation? ▸ 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? ▸ How much protein should I eat if I weigh 280 pounds and want to cut a 100 pounds of fat off of my body? ▸ How are people using 10mg reta vials at low doses during the weight loss plateau phase — what the research actually says? ▸ Does drinking Sparkling Ice (flavored sparkling water - 5 calories per bottle) during my fasting window break my fast and the role of cortisol and stress hormones during the weight loss plateau phase? ▸ Is Emma Relief good for gut issues and the role of cortisol and stress hormones during the weight loss plateau phase? 📖 Insulin Resistance — A condition where your cells stop responding to insulin, locking fat in storage; our protocol is designed to unlock thes… 📗 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? ▸ How long does it take to Is Autophagy? 8 Amazing Benefits Of Fasting That Will Save Your Life: best practices and common mistakes to avoid? ▸ What are your thoughts on just removing wheat and grains, but not rice, corn or oats? Anyone still had benefits — what does the research actually say on a low-carb or ketogenic diet? 📖 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… ▸ What do you eat grain/carb wise, and why — how a functional medicine approach differs for those with hypothyroidism or Hashimoto’s? ▸ Thyroid tests all in range— but high calcium — how a functional medicine approach differs during the weight loss plateau phase?