Scientists have linked a specific gut bacterium, Roseburia inulinivorans, to stronger muscles in both humans and mice. Older adults who carried it had 29% greater handgrip strength, while treated mice gained about 30% more grip strength and developed larger, more fast-twitch muscle fibers. The ...

Source: [ScienceDaily](https://www.sciencedaily.com/releases/2026/08/260820202904.htm)

Sponsored