You absolutely cannot safely drink liquid oxygen. It would cause catastrophic internal freezing and tissue destruction long before it could “give you extra oxygen.”

What liquid oxygen actually is

  • Liquid oxygen is oxygen cooled to about −183 °C (−297 °F), making it an extremely cold cryogenic liquid used in rockets, industry, and some medical systems.
  • At this temperature, it is far colder than dry ice and behaves more like a powerful freezing agent than anything remotely drinkable.

What would happen if you tried

If someone somehow got liquid oxygen into their mouth or throat, several things would happen almost instantly:

  • Severe cryogenic burns and frostbite to lips, tongue, mouth, and throat tissues, similar to pressing wet skin on metal dipped in liquid nitrogen.
  • Rapid freezing and cracking of soft tissue inside the esophagus and possibly the stomach lining, causing massive internal injury and bleeding. This is consistent with how liquid oxygen damages unprotected skin on contact.
  • Intense pain followed by tissue death (necrosis), with a high risk of life‑threatening complications like perforation of the esophagus or stomach and infection.

In other words, the damage is from the extreme cold, not from “too much oxygen” in your stomach.

Oxygen toxicity and pressure issues

Even when oxygen is inhaled as a gas (not liquid), too much can be harmful:

  • Breathing very high oxygen concentrations (around 80–100%) for extended periods can irritate and damage lung tissue and cause fluid buildup in the lungs (pulmonary edema).
  • At high pressure (such as in hyperbaric settings), pure oxygen can cause neurological effects like dizziness, muscle twitching, vision changes, and seizures.

So using liquid oxygen as some kind of “super-oxygen boost” by mouth is both physically impossible (it would boil and violently expand) and medically extremely dangerous.

Why it’s used safely in medicine and industry

Liquid oxygen itself is not “poison” when handled correctly, but it is strictly controlled:

  • Medical and industrial systems keep it in insulated tanks and let it warm up and vaporize before people ever breathe it as a gas.
  • Safety guidance emphasizes that contact with liquid oxygen can cause severe frostbite and burns, and workers must avoid skin exposure and use protective equipment.

Those safety rules exist precisely because direct contact—especially anything like drinking—would be extremely harmful.

Bottom line

  • No, you cannot safely drink liquid oxygen.
  • Any attempt would result in immediate, severe internal freezing injuries and could easily be fatal.
  • Oxygen therapy should only ever be used in medically supervised, properly designed systems—never improvised, and never as a liquid taken by mouth.

Information gathered from public forums or data available on the internet and portrayed here.