What are the main signs and symptoms of lactose intolerance?

    Last Updated: October 25, 2023

    People with lactose intolerance experience digestive symptoms due to intestinal bacteria consuming the undigested lactose. Symptoms vary widely from person to person, and can include flatulence and bloating (from the excess gas produced by intestinal bacteria), borborygmus (a delightful word that refers to tummy rumbling from gas and liquid sloshing around), diarrhea (caused by osmotic pressure due to undigested lactose), abdominal pain, and nausea. Symptom onset is usually 30 minutes to 2 hours after ingesting lactose.[1]

    References

    1. ^Di Costanzo M, Berni Canani RLactose Intolerance: Common Misunderstandings.Ann Nutr Metab.(2018)