Myths vs facts: LCT and menopause

Myth: Menopause causes lactose intolerance. Fact: Lactase persistence is determined by the LCT gene and does not change with menopause. However, hormonal shifts (estrogen decline) can alter gut motility and sensitivity to lactose, leading to bloating or diarrhea – mimicking lactose intolerance. Many women misattribute these symptoms to newly developed lactose intolerance. A genetic test for LCT (e.g., rs4988235) only indicates genetic predisposition, not current digestive function. Evidence for a direct link between menopause and lactose intolerance is weak (mechanistic/observational). Clinically, a lactose breath test or elimination diet is more informative. Bottom line: Menopause may temporarily affect lactose digestion, but true lactose intolerance is genetically stable. Marketing often overstates the role of genetics.