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 supplements like EPA and DHA might help these fats get into your muscle and energy-producing parts of cells, which could help your muscles grow and work better—but studies in healthy people don’t always agree on whether it actually boosts muscle building.

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.

Taking omega-3 supplements might help your muscles grow better when you eat protein or work out, especially if you're sick or have a medical condition—but it doesn't always work for healthy people.

Taking omega-3 supplements might help muscle health more in people who are losing muscle due to illness or aging than in healthy people, but it’s not certain how much better it is.

Taking omega-3 supplements may help you build more muscle and get stronger, no matter if you exercise or not.