Can LCT help with Sport?

Whether the LCT gene (lactase persistence) helps with sport is not directly supported by the provided context. LCT determines the ability to digest lactose, the sugar in milk. For athletes with lactose intolerance, dairy can cause gastrointestinal distress (bloating, cramps, diarrhea), potentially impairing performance. Conversely, lactose-tolerant individuals can use dairy as a convenient source of protein and calcium for recovery and bone health. However, the effects are modest and highly individual, influenced by gut microbiome adaptation and overall diet. Evidence is primarily mechanistic and observational; no strong studies show a direct performance benefit from LCT variants alone. A DNA test can indicate predisposition, but it does not replace personalized nutrition advice. Caveat: The role of dairy in sports nutrition is multifactorial, and genetic testing is only one piece of the puzzle.