Gut & Microbiome
kombucha causes weight loss
In plain terms: Does kombucha help you lose weight?
Part of: • kombucha
The one human trial that measured it found no weight loss. A 10-week RCT in people with excess weight saw no drop in weight (it nudged a couple of markers); anti-obesity effects otherwise exist only in cells and animals. Not a weight-loss drink.
📅 Last reviewed: 2026-07-15 ⓘ
Evidence ladder
How far up the ladder this claim has climbed. A high consensus on a low rung means "consistent so far," not "proven in people."
Top evidence so far: Human trials (RCT / n-of-1)
How the studies fall
What the evidence shows
The one human trial that actually measured it found NO weight loss. A 10-week RCT of green-tea kombucha in people with excess weight did not enhance weight loss (it did nudge some metabolic markers); anti-obesity effects otherwise live only in cell and animal studies. Not a weight-loss drink.
The evidence (6)
| Source | Grade | Stance | Quality | Finding |
|---|---|---|---|---|
| Fraiz 2024 · Nutrients | RCT | contradicts | moderate | RCT in adults with excess weight: green-tea kombucha did NOT enhance weight loss over 10 weeks. |
| Liu 2024 · J Food Sci | animal | mixed | low | In-vitro/animal: kombucha inhibited digestive enzymes and reduced adiposity (preclinical anti-obesity, unconfirmed in humans). |
| Permatasari 2022 · Clin Nutr ESPEN | animal | mixed | low | Obese rats (kombucha + sea grapes combo): reduced adiposity (combination product, animal). |
| Costa 2023 · Crit Rev Food Sci Nutr | observational | supports | low | Systematic review: in-vitro/animal studies suggest anti-obesity effects — but this preclinical signal has not been confirmed in humans. |
| Liu 2026 · Front Nutr | animal | supports | low | High-fat-diet mice (kombucha soymilk combo): metabolic benefit from a combination product. |
| Bonifacio 2026 · J Food Sci | RCT | contradicts | low | Human trial: green-tea kombucha within an energy-restricted diet — any weight/cardiometabolic effect is confounded by the diet. |
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