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Your gut acid can melt steel

It's true, your stomach acid is strong enough to dissolve metal. Here's why

By Smartasaurus· 1 min read Curious

it will completely dissolve. So

Knowledge check

What prevents your stomach from digesting itself while breaking down food?

The short version
  • It's true, your stomach acid is strong enough to dissolve metal. Here's why
  • Even with this shield, the environment is so corrosive that your stomach must sprout a completely new lining every three to four days.
  • If the mucus production slows down for even a few hours, the acid begins to eat the living tissue underneath.

The hydrochloric acid in your stomach is potent enough to dissolve a metal zinc nail. The only reason it doesn't melt your own chest is a sacrificial layer of alkaline mucus that coats your stomach lining.

This mucus is rich in bicarbonate, which neutralizes the acid on contact. It acts as a neutral zone where the burning liquid meets a cooling base.

Even with this shield, the environment is so corrosive that your stomach must sprout a completely new lining every three to four days. You are effectively growing a new stomach twice a week to stay ahead of your own digestion.

More from You, Inside
Your stomach acid can melt steel

If the mucus production slows down for even a few hours, the acid begins to eat the living tissue underneath. This failure of the shield is exactly what causes a peptic ulcer, meaning your body has quite literally started to digest itself.

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