Is LCT useful for Stress?

The question of whether LCT (lactase gene) is useful for stress has no scientific basis. LCT determines lactose digestion ability and has no known role in stress responses or regulation. The provided knowledge context contains no evidence linking LCT variants to stress. Direct-to-consumer tests often overclaim clinical relevance. Even if a test associates LCT with stress, it is an unsupported claim. For stress management, established factors such as sleep, exercise, diet, and psychological support are far more relevant. Evidence: none. Sources: none.