Your stomach acid is strong enough to dissolve a razor blade — slowly
Some trivia is so bizarre it forces you to rethink your entire understanding of the world. Check out the fact below, see how others reacted, and scroll down to dive into the verified science and history behind it.
Stomach acid (hydrochloric acid) has a pH of around 1.5–3.5 — roughly equivalent to battery acid. Given enough time, it can dissolve metals including iron. A razor blade left in stomach acid would gradually corrode over several days. Your stomach lining is protected by a mucus layer 1–1.5 mm thick that renews itself every 3 days, preventing the acid from eating through the organ itself. When this mucus layer fails partially, the result is a stomach ulcer.
We contain something with the chemical strength of battery acid, held at bay by a thin layer of mucus that replaces itself every three days. The body's margin for error here is remarkably thin.
The Science Behind It
Stomach acid (hydrochloric acid) has a pH of around 1.5–3.5 — roughly equivalent to battery acid. Given enough time, it can dissolve metals including iron. A razor blade left in stomach acid would gradually corrode over several days. Your stomach lining is protected by a mucus layer 1–1.5 mm thick that renews itself every 3 days, preventing the acid from eating through the organ itself. When this mucus layer fails partially, the result is a stomach ulcer.
Why Your Brain Finds This Hard to Believe
Sources & Verification
OddlyHuman Editors
VerifiedWritten and fact-checked by the OddlyHuman Behavioral Science Team. We verify all psychological, sociological, and historical claims against peer-reviewed journals, primary sources, and established encyclopedias to bring you accurate insights.
Read our Editorial Guidelines →“Your stomach acid is pH 1.5 — strong enough to slowly dissolve a razor blade. A thin mucus layer (replaced every 3 days) is all that stops it from eating through your stomach wall. ⚗️ #OddlyHuman”