eli5: When someone is lactose intolerant they cannot digest the milk sugar lactase. What happens to the calories that the lactase accounts for in the milk then? Is it digested or excreted?

Question

eli5: When someone is lactose intolerant they cannot digest the milk sugar lactase. What happens to the calories that the lactase accounts for in the milk then? Is it digested or excreted?

In: Biology

Answer 1

Typically some bacteria in the gut will turn it into something they can digest.
The bacteria makes gas as a byproduct and they fart it out.

The rest is pooped out.