As we age, tiny amounts of ongoing body inflammation can weaken our muscle power and size, but taking omega-3 fatty acids—like those in fish oil—may help protect our muscles by calming down that inflammation and keeping our energy factories (mitochondria) working well.

Taking omega-3 fatty acids might help your muscle cells work better and stay healthier as you age or if you're inactive, but it doesn't reliably make your muscles grow or repair faster.

Taking omega-3 fatty acids might help reduce harmful stress in muscle cells, especially as we age or if we're sick, and this could help muscles stay stronger and work better — but this has only been seen in animal or lab studies so far.

Extra TFAM in mouse muscles makes their mitochondria slightly leaky (mild uncoupling), which helps them stay stable and not collapse when flooded with fat—this keeps them from making too many harmful free radicals.

Omega-3 fatty acids, found in fish and some plants, help your body calm down long-term inflammation, improve blood vessel health, and keep your cells’ energy systems running smoothly.

Taking omega-3 supplements might help lower inflammation in older people, especially if they also exercise, which could help them keep their muscles stronger as they age.