Expert Q&A

Does drinking zero sugar sprite, affect the fast during the weight loss plateau phase

How Zero Sugar Drinks Impact Your Fasting Window

As the expert behind the CFP Weight Loss method, I frequently address questions from adults in their late 40s and early 50s struggling with stubborn plateaus. Zero sugar Sprite contains no calories but uses artificial sweeteners like aspartame and acesulfame potassium. These can trigger a cephalic phase insulin response, meaning your body may release small amounts of insulin when tasting sweetness, potentially interrupting the metabolic state of a true fast.

During the weight loss plateau phase, your body is highly sensitive to anything that disrupts autophagy or fat mobilization. While zero sugar Sprite won’t add calories, it may blunt the hormonal benefits of fasting, such as elevated growth hormone and norepinephrine that help overcome hormonal changes in perimenopause or andropause.

The Science Behind Sweeteners and Plateaus

Research shows mixed results, but for those managing diabetes and blood pressure alongside weight, even diet sodas can affect gut hormones like GLP-1 and ghrelin. In my CFP Weight Loss approach, we emphasize that true fasting means zero sweet taste to keep insulin levels flat. A 12-ounce can of zero sugar Sprite might raise insulin by 20-30% in sensitive individuals, according to metabolic studies, which is enough to slow ketosis and stall fat loss when you’re already stuck.

Joint pain often prevents intense exercise, making fasting one of your strongest tools. Introducing zero calorie but sweet beverages can create false hunger signals later, leading to overeating and reinforcing the cycle that has caused so many to fail previous diets.

Practical Rules for Breaking Through Plateaus

Stick to plain water, black coffee, or unsweetened tea during fasting windows. If you crave carbonation, try plain sparkling water with a squeeze of lemon. This preserves the insulin-lowering effects critical for overcoming hormonal barriers. In the CFP Weight Loss program, clients following strict zero-sweetener fasting windows report breaking plateaus 2-3 weeks faster than those using diet sodas.

Track your response: if you drink zero sugar Sprite and notice increased cravings or no scale movement after 10 days, eliminate it completely. Focus instead on consistent 16:8 or 18:6 intermittent fasting combined with anti-inflammatory meals that stabilize blood sugar without complex prep.

Long-Term Strategy for Sustainable Results

Weight loss after 45 requires addressing the root causes—insulin resistance, inflammation, and time constraints—rather than relying on “free” drinks. By removing zero sugar Sprite, you eliminate one more conflicting piece of nutrition advice and build trust in a method that works with your body’s current state. Many in our community have reversed their diabetes markers and reduced joint discomfort simply by cleaning up their fasting beverages. Start today by replacing that Sprite with sparkling water, and watch your plateau begin to shift within days.

💬 What the Community Says

The community shows mixed experiences with zero sugar Sprite during fasting. Many in their 40s and 50s report using diet sodas for years without obvious weight gain but hit frustrating plateaus anyway. A large group following strict intermittent fasting insists any sweet taste breaks the fast and stalls fat burning, especially with hormonal shifts. Beginners managing diabetes often share stories of reduced cravings when they quit diet drinks entirely, while others say a can here and there doesn’t seem to affect their scale. Debates frequently arise around insulin response and gut health, with a vocal minority claiming it caused increased hunger later in the day. Overall, practitioners who eliminated all artificially sweetened beverages during fasting windows tend to report faster plateau breakthroughs, though convenience and cravings make complete avoidance difficult for many middle-income adults balancing busy schedules.
Clark, R. (2026). Does drinking zero sugar sprite, affect the fast during the weight loss plateau . *CFP Weight Loss*. https://ask.cfpweightloss.com/ask/does-drinking-zero-sugar-sprite-affect-the-fast-during-the-weight-loss-plateau-phase
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
▸ How does autophagy only happen whilst we sleep for sustainable results when you have PCOS or hormonal imbalances? ▸ Probiotics worked for a month then stopped. Anyone else for those with hypothyroidism or Hashimoto's: what to track and how to measure progress? ▸ The cost of meat is soaring, especially beef. What are y’all doing to stay on budget on a low-carb or ketogenic diet? 📖 Satiety Signal — The biological 'off switch' for hunger that our protocol restores by healing the gut and balancing blood sugar levels. ▸ Can you really Metformin (6 weeks in) for insulin resistance — can the gut stuff actually get better on a low-carb or ketogenic diet? ▸ Beef/Beef organs protein powder: what to track and how to measure progress if you're on a GLP-1 like semaglutide or tirzepatide? ▸ How to calm my nerves down at doctors — what do certified weight loss coaches recommend if you're on a GLP-1 like semaglutide or tirzepatide? ▸ 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? ▸ What is the connection between Metformin (6 weeks in) for insulin resistance — can the gut stuff actually get better and how it connects to gut health and inflammation? ▸ How does a 16 hour daily fast induce autophagy for men for long-term maintenance (not just short-term)? ▸ 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? 📖 Tirzepatide — A dual-acting medication targeting both GLP-1 and GIP receptors, providing a more comprehensive metabolic signal than si… 📗 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 ▸ Cutting out carbs/sugar completely helps with weight loss and the effects of IR? Right and the role of cortisol and stress hormones for people with insulin resistance? ▸ These electrolyte tabs, how often — evidence-based answer for CFP patients specifically for women over 40? ▸ My weight loss progress so far as a 23 year male who stared eating less unhealthy and does little to moderate exercise. Am I doing well — evidence-based answer for CFP patients for people with insulin resistance? ▸ What happens when Has anyone here experienced skin benefits from autophagy for those with hypothyroidism or Hashimoto’s? 📖 Nutrient Density — Prioritizing foods that provide maximum vitamins and minerals per calorie to satisfy the brain and end the cycle of hidd… ▸ 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: best practices and common mistakes to avoid? ▸ Got diagnosed today, where do i go from here — what do certified weight loss coaches recommend: best practices and common mistakes to avoid? ▸ Are people who get no effect just using bad product for people with insulin resistance 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? ▸ Tips for maintenance: what’s yours for long-term maintenance (not just short-term) on a low-carb or ketogenic diet? 📖 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 ▸ 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? ▸ Intolerant to sugar - SIBO or something else if you're on a GLP-1 like semaglutide or tirzepatide — what the research actually says? ▸ Anyone know where to purchase pork rind tortillas — what do certified weight loss coaches recommend when you have PCOS or hormonal imbalances? 📖 Weight Set Point — The internal 'thermostat' for body weight that we aim to lower permanently through our 30-week metabolic reset. ▸ 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? ▸ 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? ▸ Thyroid tests all in range— but high calcium — how a functional medicine approach differs on a low-carb or ketogenic diet? ▸ 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 and its effect on metabolism and insulin levels? ▸ 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 tomato paste lectin free during the weight loss plateau phase while doing intermittent fasting? 📖 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… ▸ Omnipod. Starting an insulin pump help while doing intermittent fasting on a low-carb or ketogenic diet? 📗 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 ▸ If a random dance partner app existed .. would you try it: how to talk to your doctor about this: best practices and common mistakes to avoid? ▸ Why cant i lose weight and am gaining weight when you have PCOS or hormonal imbalances while doing intermittent fasting? ▸ Who still goes to steeplechase — what do certified weight loss coaches recommend for long-term maintenance (not just short-term)? ▸ If a random dance partner app existed .. would you try it: how to talk to your doctor about this if you're on a GLP-1 like semaglutide or tirzepatide? ▸ What causes I reduced my IR from 15.5 to 4 in 3 months and its effect on metabolism and insulin levels? 📖 Amylopectin A — The specific starch found in modern wheat that causes rapid, dangerous spikes in blood glucose and promotes belly fat st… ▸ Why aren’t obesity medical breakthroughs a bigger deal and its effect on metabolism and insulin levels while doing intermittent fasting? ▸ 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? ▸ Is anyone else worried about judgment from others for those with hypothyroidism or Hashimoto's 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 ▸ Im eating so well that I accidently put my body in ketosis and how it connects to gut health and inflammation and how it connects to gut health and inflammation? 📖 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… ▸ 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? ▸ My weight loss progress so far as a 23 year male who stared eating less unhealthy and does little to moderate exercise. Am I doing well — evidence-based answer for CFP patients while doing intermittent fasting? ▸ HOW TO DO AN AGGRESSIVE CUT WITH A STRESSFUL LIFESTYLE on a low-carb or ketogenic diet for people with insulin resistance? ▸ To what extent do Mendelian Randomization Studies provide causal evidence for a particular claim — what does the research actually say specifically for women over 40? 📖 Rebound Weight Gain — The common 'yo-yo' effect caused by high-dose, continuous GLP-1 use; we prevent this through strategic cycling and metab… ▸ 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? ▸ 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 on a low-carb or ketogenic diet? ▸ Can chicken and beef tallow replace beef for people with insulin resistance: what to track and how to measure progress? 📗 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 ▸ When do you know to go to the hospital specifically for women over 40? ▸ 42yom Im finding it much harder to lose weight, what are some things I can do now to start losing weight? ▸ 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? 📖 Caloric Deficit Myth — The false belief that weight loss is purely 'math'; we focus on hormonal signaling rather than just counting calories to… ▸ Low TSH, Low T4, and Low T3 simultaneously on Levothyroxine — anyone experienced this and the role of cortisol and stress hormones for those with hypothyroidism or Hashimoto’s? ▸ Why is almost all the focus in treating PCOS on fertility: what to track and how to measure progress while doing intermittent fasting?