Archive · 2 Sep 2026
What Stomach Acid Really Does to Swallowed Razor Blades
Scientists tested razor blades in liquid designed to copy stomach acid.
The liquid slowly damaged the blades over many hours.
After one day, the blades had lost more than one-third of their weight.
Some blades became weak enough to break with a medical tool.
But food usually stays in the stomach for only about 30 to 120 minutes.
That is not long enough for stomach acid to safely dissolve a razor blade.
A swallowed blade can cut the stomach or intestines.
It can cause bleeding, infection, or even death.
Anyone who swallows a sharp object needs urgent medical care.
A 1997 study tested razor blades in simulated gastric juice at 37°C.
After 24 hours, the blades retained about 63% of their original weight.
Double-edged blades became breakable with an endoscopic snare after 15 hours.
The thickened back of a single-edged blade dissolved completely within two hours.
Swallowed sharp objects remain medical emergencies despite laboratory corrosion findings.
- Who
- Researchers studying swallowed metal objects and endoscopic treatment.
- What
- They tested how simulated stomach acid affected razor blades, disk batteries, and pennies.
- When
- The study was published in 1997; the objects were observed for up to 48 hours.
- Where
- In laboratory tests using simulated gastric juice at 37°C.
- Why
- To measure corrosion of commonly swallowed metal objects and assess implications for endoscopic removal.
Laboratory Finding
Medical Reality
Can stomach acid dissolve razor blades?
Laboratory Finding
In simulated gastric juice, thin stainless-steel razor blades corroded substantially over 24 to 48 hours and became fragile.
Medical Reality
The human stomach does not hold food long enough for rapid dissolution, and swallowed blades can cause severe injury before meaningful corrosion occurs.
What does the experiment mean for treatment?
Laboratory Finding
The study suggested that corrosion could affect the timing and technical difficulty of endoscopic removal.
Medical Reality
The finding does not make swallowing blades safe; urgent medical assessment and removal may still be necessary.
- Study publication
- Gastrointestinal Endoscopy, 1997
- Test conditions
- Simulated gastric juice at 37°C
- Razor blade weight after 24 hours
- About 63% of the original weight
- Blade breakage
- Double-edged blades could be broken with an endoscopic snare after 15 hours
- Single-edged blade finding
- The thickened back dissolved completely within two hours
- Other objects
- Pennies were unaffected, and no leakage was detected from disk batteries
- Medical warning
- Swallowed sharp objects can cause perforation, bleeding, infection, and death