What role does CYP2C19 play in Sport?

CYP2C19 is a cytochrome P450 enzyme primarily involved in the metabolism of drugs such as clopidogrel, proton pump inhibitors, and certain antidepressants. In sports, its role is not directly performance-related. There is no strong evidence that CYP2C19 variants significantly affect endurance, strength, or recovery. Its relevance lies mainly in how an individual metabolizes medications that might be used in sports (e.g., NSAIDs, caffeine). However, the effects are generally small and overshadowed by other genetic and lifestyle factors. A DNA test for CYP2C19 may offer clues about drug tolerance but cannot predict athletic potential. The evidence is mostly mechanistic and lacks large-scale sport-specific studies. Caution: no single gene determines athletic performance. MyBody-X tests are not diagnostic.