system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: When you take antibiotics, do they also kill the healthy bacteria in your gut?

I'm currently on a course of antibiotics to treat Tonsillitis and it got me thinking, do antibiotics kill all bacteria indiscriminately, or can they target the specific bacteria causing the infection? 

If they do kill all bacteria including healthy gut bacteria, is there any foods I could eat to regain my healthy gut bacteria after I've finished the course of antibiotics? 

Thanks!
gpt
Yeah they do, that's why you're usually prescribed probiotics with them, like yeast. Loss of gut bacteria is also what causes you to be diarrheic when you're under antibiotics, since you can't process food correctly anymore: it just "goes straight"