Gut & Microbiome
kombucha improves immune function
In plain terms: Does kombucha boost your immune system?
Part of: • kombucha
No human evidence. A mouse study found it calmed inflammation, and there are test-tube effects, but nothing has tested whether drinking kombucha strengthens immunity in people.
📅 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: Animal studies (Animal)
How the studies fall
What the evidence shows
No human evidence. A mouse study found kombucha calmed inflammation in induced sepsis, and reviews cite test-tube immune effects — but nothing has tested whether drinking kombucha strengthens immunity in people.
The evidence (3)
| Source | Grade | Stance | Quality | Finding |
|---|---|---|---|---|
| Kapp 2019 · Ann Epidemiol | observational | mixed | low | Systematic review: immune-boost claims are untested in humans. |
| Wang 2021 · Food Funct | animal | supports | low | Mouse model: kombucha attenuated LPS-induced sepsis and inflammation (immune-modulatory in animals). |
| Su 2024 · Front Microbiol | animal | supports | low | Mice (turmeric-kombucha combo): immunomodulatory protection against LPS challenge (combination product, animal). |
Disagree, or know a study we missed?
We grade by evidence, not opinions. The way to weigh in is to point us to a study we haven't cited (check the evidence table above first), or to flag a problem with one we have. Every submission is reviewed; if it holds up, the grade updates and shows in Science Changes Its Mind.
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Educational only, not medical advice. Grades and scores reflect published evidence weighted by study design and quality; see the methodology.