ELi5: What determines the reaction the body has to dairy?

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I am slightly lactose intolerant. I only say “slightly” because *think* I have a higher tolerance to dairy than other people but ofc still have limits.

A little TMI below so please be warned ^^;

Like for today for instance. I ate a Philly cheesesteak (it was so good), it didn’t give me diarrhea, but it did soften my stool and made me go about 15~25 minutes after eating it. But there are other times where I have dairy and it will just give me mild constipation.

In: Biology

6 Answers

Anonymous 0 Comments

Lactose is a sugar which can not be absorbed by your body. In babies and people with a specific mutation the lactose gets broken down so it can be absorbed. But for most adults the lactose does not get broken down and instead pass to the gut where there is bacteria that can digest it. It is basically the school science experience of mixing yeast, luke warm water and sugar to create a yeast explosion, except in your lower intestines. However different types of microbes will react differently to the lactose. Some can digest it better then others. So depending on your gut bacteria you may get different reactions to the lactose. In general the more lactose you consume the more of the bacteria that can easily digest lactose you get and the worse your reaction to lactose will be.

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