Supplements can impact fitness performance and recovery by providing essential nutrients that may be lacking in one’s diet. Common supplements include protein powders, BCAAs, creatine, and beta-alanine, which can enhance performance and help build muscle. They can also aid in recovery by reducing muscle soreness and inflammation. However, supplements should complement a well-balanced diet rather than replace it. Relying too heavily on supplements without addressing dietary needs can lead to imbalances. Consulting a healthcare professional is advisable before starting any supplementation regimen to ensure safety and efficacy.