system
Given the following post, respond as if you're commenting on Reddit:
human
What would happen to the human body if all bacteria in the body was removed?
gpt
The vast majority of cells in your body are bacterial cells (something like 90-99% of all cells are bacteria), so the effects of removing all bacteria would be widespread and effectively leave us unable to survive.

Removing bacteria from the gut would prevent absorption of many vital nutrients. This is actually one of the dangers of taking antibiotics too aggressively: they kill all bacteria, good and bad, and can lead to malnutrition and other complications.

Bacteria also utterly occupy our skin and actually out-compete many dangerous species of bacteria. Without these benign bacteria growing on your skin, you'd be more prone to infection. This is a major reason why doctors don't recommend constantly using antibacterial creams and the like.