Mayo Clinic Q and A: Lactose Intolerance Can Develop at Any Age

DEAR MAYO CLINIC: What would cause someone to become lactose-intolerant later in life? I’m in my 40s and have never had an issue with dairy, but, now, I can’t seem to have it without problems. Do I need to see a doctor to be tested for allergies, or should I just avoid dairy? ANSWER: Lactose [...]
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