Commonly used nutritional supplements among athletes include protein powders, creatine, and BCAAs (branched-chain amino acids). Protein powders aid in muscle recovery and growth, while creatine enhances performance, particularly in high-intensity exercises. BCAAs can help reduce muscle soreness and fatigue. Other popular supplements include omega-3 fatty acids for inflammation and joint health, electrolytes for hydration, and multivitamins to fill nutritional gaps. However, athletes should consult with a healthcare professional to ensure that these supplements align with their specific needs and goals.