People Are Only Just Realising Your Stomach Gets A Brand New Lining

The organ that digests your lunch would happily digest itself, so it cheats constantly.

Your stomach is filled with acid strong enough to dissolve metal, which raises an obvious and slightly alarming question: why does it not dissolve you?

The answer is a slippery coat of mucus that lines the stomach wall, forming a protective barrier between the acid and your actual flesh. Without it, you would essentially start eating yourself.

The clever part is that this lining is under constant attack, so your body replaces it relentlessly. Fresh cells are pumped out so quickly that the entire surface renews every few days.

So the stomach you had last week is not quite the stomach you have now. It is one of the fastest self-repairing surfaces in your whole body, patching itself faster than you can notice.