KRYPTONITE: SUPERMAN'S WEAK SPOT Kryptonite is a fictional mineral in the Superman story, originally from his native planet, Krypton. It is a radioactive substance that adversely affects Kryptonians like Superman, weakening their abilities and, in extreme cases, killing them. Some minerals, such as autunite or torbenite, may have a greenish brightness similar to kryptonite, but they do not have any radioactive effects on humans or any other living beings. On the other hand, prolonged exposure to radioactive materials like plutonium, uranium, and radium can be dangerous to human health and cause illnesses such as cancer and other medical complications. Therefore, if a greenish-bright material from autunite or torbenite were mixed with the radioactivity of uranium, plutonium, or radium, it could create a human kryptonite.

KRYPTONITE: SUPERMAN'S WEAK SPOT (weakness) Kryptonite is a fictional mineral in Superman. It is originally from his native planet (Krypton). It is a radioactive substance that affects Kryptonians badly. As seen with superman Superman, it effectstheir abilities and, in extreme cases, kills them. Some minerals such as autunite or torbenite may have a greenish bright colour, similar to kryptonite, but they don't have any radioactive effect on humans or any other living beings. On the other hand, long exposure to radioactive materials like plutonium, uranium, and radium can be dangerous to people's health and cause illnesses such as cancer and other medical complications. Therefore, if greenish bright material from autunite or torbenite were mixed with the radiactivity of uranium, plutonium, or radium, there would be a human kryptonite.