Switching from sugary drinks to diet drinks with artificial sweeteners helps people lose a little weight and eat fewer calories overall.
Claim Context
Replacing sugar-sweetened beverages with low-calorie sweetened beverages leads to a reduction in body weight of approximately 1.35 kg in adults over interventions lasting 1 to 40 months, and results in significantly lower energy intake compared to sugar-sweetened alternatives, suggesting a beneficial role in weight management.
“A meta-analysis of intervention RCTs ranging from 1 to 40 months showed that LCS v. sugar led to a reduction in body weight of 1⋅35 kg (nine comparisons), and a similar relative reduction in body weight v. water (three comparisons).”
Evidence from Studies
No evidence studies found yet.
What Would Prove This
Per GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this claim, ordered from strongest to weakest.
The overall causal effect of LCSB substitution for SSB on long-term body weight change across diverse populations.
A systematic review and meta-analysis of at least 20 high-quality RCTs (n≥500 total participants) comparing LCSB vs. SSB over ≥12 months in adults with overweight/obesity, measuring body weight, energy intake, and adherence as primary outcomes, with risk-of-bias assessment and subgroup analyses by sweetener type, age, and baseline BMI.
Causal effect of LCSB vs. SSB on weight loss in a controlled setting with blinding and randomization.
A double-blind, parallel-group RCT of 300 adults with obesity (BMI ≥30), randomized to consume 500 mL/day of LCSB (aspartame/sucralose blend) or SSB (sucrose) for 12 months, with standardized diet and activity counseling, measuring weight change, body fat (DXA), and ad libitum energy intake as primary endpoints.
Long-term association between habitual LCSB consumption and weight trajectory in free-living populations.
A prospective cohort study following 10,000 adults aged 30–65 over 10 years, using repeated 24-hour dietary recalls and urinary biomarkers to quantify LCSB intake, and measuring annual weight change while adjusting for confounders (diet quality, physical activity, socioeconomic status).
Whether individuals who successfully maintained weight loss are more likely to have consumed LCSB compared to those who regained weight.
A matched case-control study comparing 500 weight loss maintainers (≥10% weight loss maintained ≥2 years) with 500 weight regainers, assessing prior LCSB consumption via validated FFQ and biomarkers, adjusting for baseline BMI, diet history, and psychological factors.
Consensus on the clinical utility of LCSB for weight management among nutrition experts.
A Delphi consensus process involving 50+ international nutrition scientists and clinicians evaluating evidence on LCSB and weight outcomes, producing standardized recommendations with graded evidence ratings.