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Inside Your Body
Episode 9 of 10
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Your stomach acid can melt steel

Yep, the juice in your belly is strong enough to dissolve metal really fast

By Smartasaurus· 1 min read Curious

You have a vat of industrial-grade acid sloshing around inside you right now

Field test

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The short version
  • Yep, the juice in your belly is strong enough to dissolve metal really fast
  • This caustic bath isn't just for breaking down your lunch.
  • Curiously, while it can melt steel, the acid struggles to break down a simple kernel of corn, which relies on a cellulose shell that the human body…

Your stomach houses hydrochloric acid with a pH level typically between 1 and 2. This is the same chemical used in industrial cleaners to remove rust from steel.

In a laboratory test, scientists submerged single-edge stainless steel razor blades in simulated gastric juice. After only 24 hours, the blades lost 17% of their mass and became as fragile as wet tissue paper.

The acid is strong enough to eat right through the stomach itself. To prevent literal self-digestion, your body replaces the entire inner lining of your stomach every three to four days.

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