Will I Lose Weight If I Stop Drinking Soda? What Studies Show

Will stopping soda lead to weight loss?

It can reduce calorie intake if regular soda is removed and those calories are not replaced elsewhere. The amount of weight change cannot be predicted from soda calories alone. What replaces the drink, how often it was consumed, changes in food intake, and the rest of a person’s routine all matter.

Estimate the calories removed

Use the nutrition label and the amount usually consumed. If a drink contains 140 calories and someone replaces one serving each day with a zero-calorie drink, the arithmetic difference is 140 calories per day, or 980 calories across seven days. This is an intake calculation, not a forecast of pounds lost.

A fixed-calorie-per-pound calculation overstates long-term weight change because energy expenditure changes as body weight changes. NIDDK’s dynamic body-weight model accounts for those changes; the sources do not establish a fixed monthly result or a 12-to-16-week plateau after stopping soda.

What beverage-replacement trials measured

Study	Participants and comparison	Measured result	Limit
CHOICE randomized trial	318 adults with overweight or obesity; replaced at least 200 kcal/day in caloric beverages with water, diet beverages, or usual-choice changes for six months.	Mean weight change was about -2.0% with water, -2.5% with diet beverages, and -1.8% in the attention-control group; between-group weight differences were not statistically significant.	Does not predict the effect of stopping one person’s soda without other changes.
One-year beverage trial	203 habitual sugar-sweetened beverage consumers randomized to sugar-sweetened, artificially sweetened, or unsweetened drinks.	Overall weight change did not differ across groups; analyses found differences among participants with higher baseline trunk fat.	Does not establish a universal calorie-compensation percentage or timeline.
Two-year beverage trial	493 adults in a behavioral weight-management program; water versus non-nutritive-sweetened beverages in year one, followed by an unassisted year.	At week 104, mean weight loss was 3.7 kg with water and 4.8 kg with non-nutritive-sweetened beverages; the groups met the study’s equivalence criterion.	Not a trial of regular-soda elimination alone.

Diet soda or water?

These trials do not support the claim that diet soda necessarily causes less weight loss than water. In the two-year behavioral program, water and non-nutritive-sweetened beverage groups had equivalent weight change at the reported endpoint.

Limits of the evidence

The cited studies do not establish that everyone compensates by a fixed number of calories, that weight loss stops after a set number of weeks, or that soda uniquely changes insulin in a way that guarantees fat gain. They did not validate the former page’s 60% compensation estimate, 84-calorie daily figure, 40% diet-soda penalty, or promised weekly loss range.

FAQ

How much weight will I lose if I stop drinking soda?

The studies do not provide an individual forecast. A label shows calories removed; it cannot predict how the rest of a person’s intake or weight will change.

How long does it take to see a change?

The studies assessed group outcomes over months. They do not establish a fixed onset date or plateau for an individual.

Does diet soda prevent weight loss?

The cited trials do not show that non-nutritive-sweetened beverages produce less weight loss than water.

Studies and model

• CHOICE randomized clinical trial, 2012
• Randomized beverage trial, 2020
• Two-year beverage trial, 2026
• NIDDK, research behind the Body Weight Planner

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• If I Stop Drinking Soda Will I Lose Belly Fat? The Timeline, the Mechanism, and Why It Fails for 40% of People
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• Tool: weight-loss timeline tool

Sources

1. de Ruyter JC et al. A trial of sugar-free or sugar-sweetened beverages and body weight in children. New England Journal of Medicine. 2012.
2. Maersk M et al. Satiety scores and satiety hormone response after sucrose-sweetened soft drink compared with isocaloric semi-skimmed milk and with non-caloric soft drink: a controlled trial. European Journal of Clinical Nutrition. 2013.
3. Mourao DM et al. Effects of food form on appetite and energy intake in lean and obese young adults. Appetite. 2009.
4. Sumithran P et al. Long-term persistence of hormonal adaptations to weight loss. Obesity. 2014.
5. Wansink B et al. Bottomless bowls: why visual cues of portion size may influence intake. Journal of Marketing Research. 2006.
6. Zheng M et al. Substitution of sugar-sweetened beverages with other beverage alternatives: a review of long-term health outcomes. BMJ. 2015.
7. Rosenbaum M et al. Long-term persistence of adaptive thermogenesis in subjects who have maintained a reduced body weight. American Journal of Clinical Nutrition. 2008.
8. Peters JC et al. The effects of water and non-nutritive sweetened beverages on weight loss during a 12-week weight loss treatment program. Obesity. 2014.
9. Yang Q et al. Artificial sweeteners and sweet taste preference. Appetite. 2017.
10. Just T et al. Cephalic phase insulin release in healthy humans after taste stimulation. Appetite. 2008.
11. Suez J et al. Artificial sweeteners induce glucose intolerance by altering the gut microbiota. Nature. 2014.
12. Ludwig DS et al. High glycemic index foods, overeating, and obesity. Lancet. 2001.
13. Stanhope KL et al. Consuming fructose-sweetened, not glucose-sweetened, beverages increases visceral adiposity and lipids and decreases insulin sensitivity in overweight/obese humans. Journal of Clinical Investigation. 2012.
14. Flint A et al. Glucagon-like peptide 1 promotes satiety and suppresses energy intake in humans. Journal of Clinical Endocrinology & Metabolism. 2001.
15. Sanyal D et al. Hypothyroidism and obesity: an intriguing link. Indian Journal of Endocrinology and Metabolism. 2016.
16. Malik VS et al. Long-term consumption of sugar-sweetened and artificially sweetened beverages and risk of mortality in US adults. Circulation. 2019.

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