Fact #46
August 3, 2026Your Stomach Does Not Digest Itself
Your stomach is filled with acid powerful enough to help digest food, yet it doesn't dissolve itself. The reason isn't that the acid is weak; it's that your body has built an incredible defense system.
Mini Facts
1
Stomach acid has a pH between 1.5 and 3.5, making it one of the strongest acids in the human body.
2
A mucus layer coated with bicarbonate protects the stomach lining from acid.
3
The cells lining your stomach are replaced every 2-7 days.
4
Damage to this protective barrier can cause stomach ulcers.