Is LCT useful for Fruchtbarkeit?

The question of whether LCT is useful for fertility cannot be answered affirmatively based on current evidence. LCT encodes lactase, the enzyme that digests lactose. Variants in LCT determine lactose tolerance but have no direct, reproducible impact on fertility. Some indirect links (e.g., via diet or gut health) are conceivable but not supported by robust human studies. The evidence is therefore classified as 'unclear'. Fertility is influenced by many factors – hormones, age, lifestyle, and established genetic markers (e.g., MTHFR, FSH receptor) – but LCT is not among them. A DNA test for LCT is not useful for family planning. If you have fertility concerns, consult a doctor rather than relying on a lactose tolerance test.