system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How do probiotics work and why can taking them sometimes cause extreme abdominal discomfort?
gpt
Probiotics are colonies of good bacteria. Taking them is suppose to repopulate the gut with said bacteria, but if you get too much, if they have to fight with the existing bacteria and either die, or you are eating a diet that causes them to produce a lot of waste you will sometimes have discomfort.