Plankton, specifically marine phytoplankton, is sometimes marketed as a supplement for general health, including support for the muscles body system. The scientific evidence supporting its use for muscle health is limited but not entirely absent. Marine phytoplankton is a source of nutrients such as omega-3 fatty acids (notably EPA), protein, vitamins, minerals, and antioxidants. Omega-3 fatty acids have been shown in some studies to reduce exercise-induced muscle soreness and inflammation, and may have a role in supporting muscle recovery and function. However, the majority of studies demonstrating these effects use fish oil or algal oil supplements, rather than whole plankton preparations.

While marine phytoplankton does contain nutrients relevant to muscle health, direct studies examining whole plankton supplementation and its impact on muscle strength, growth, or recovery in humans are sparse. Animal and in vitro studies may suggest potential anti-inflammatory or antioxidant effects, which could indirectly benefit muscle tissue, but this is not robust clinical evidence. Therefore, while there is a plausible scientific rationale for considering plankton as supportive for the muscles body system due to its nutrient content, direct scientific validation via clinical trials is minimal. The evidence rating is low (2/5) due to this lack of targeted research, but it is not entirely absent.