Can LCT help with fertility?

There is no scientific evidence that the LCT gene (lactase persistence) directly influences fertility. LCT encodes lactase, the enzyme that digests lactose. No high-quality study has shown a link between LCT genotype and fertility outcomes such as egg quality, sperm function, or implantation rates. Theoretically, lactose intolerance could reduce calcium and vitamin D absorption, potentially affecting bone health and hormonal regulation, but this remains speculative. Current evidence is insufficient to recommend lactase supplements or dietary changes based on LCT status for improving fertility. For individuals trying to conceive, established factors like balanced nutrition, healthy body weight, and medical evaluation are far more relevant. Genetic testing for LCT has no proven role in fertility counseling.