Immy: one strain for a stronger immune system?
Its one published study asked whether it is safe to eat — not whether it works.
Immy is a daily capsule of a single heat-killed bacterium, Mycolicibacterium aurum Aogashima, in olive oil. Its pack leans on the “old friends” idea: that modern life cuts our contact with everyday microbes, and that this matters for immunity.
Short answer: the one published study of this strain is a safety assessment — its genes, and rats fed it for 90 days — written with a senior executive of the company that makes it. It did not measure immunity, and we found no study of it in people.
How the evidence flows
Each claim (middle), the studies that tested it (left) — green found it, red found nothing — and the grade they add up to (right). Drawn from the same records as the grades below. Tap to open full size.
Immy (M. aurum “immunobiotic”) · evidence checked 2026-10-25
What the research shows
Grades are calculated from the studies listed, by fixed rules.
- Immy’s M. aurum strain supports your immune system — fewer colds, less run-downNo real evidence
The ad said “Feeling run down. Getting sick more often. Never quite feeling 100%. / Your immune system does a lot more than you think — and supporting it goes beyond just taking vitamin C.”
Immy · Facebook ad, seen Oct 2026
The one published study of this strain checked that it is safe to eat (its genes, and rats fed it for 90 days). It did not measure immunity, and we found no study of it in people. Safe is not the same as effective.
What does help
Getting sick often, or feeling run down for weeks, is worth raising with a doctor. Enough sleep and keeping vaccinations up to date have good evidence for fewer infections.
Related: probiotic ads · colostrum
Your next step
- What has evidence insteadEnough sleep, and vaccinations kept up to dateBoth have good evidence for fewer infections. If you are sick often, a doctor can look for a reason.