Evidence check: LCT in the context of gut health

Evidence for LCT (lactase persistence) in the context of gut health is mixed. While the link between LCT variants and lactose intolerance is well-established (human-strong), extrapolation to broader gut health outcomes like microbiome composition or irritable bowel syndrome is less clear. The provided contexts contain no specific information on LCT. Therefore, a conservative stance is taken: LCT testing can indicate lactose digestion capacity, but direct dietary recommendations for gut health based solely on LCT are not strongly evidence-based. Safety note: If lactose intolerance is suspected, clinical testing (e.g., hydrogen breath test) should be sought before eliminating dairy.