As a subject matter expert in comic lore and superhero narratives, I can provide you with an accurate and detailed answer to your question about what kryptonite is and how it affects Superman.

Kryptonite is a fictional mineral originating from Superman's home planet, Krypton. It is not a naturally occurring substance on Earth but has been introduced to the planet through various means in the comics, such as meteorites or as a byproduct of certain experiments.

The primary danger of kryptonite to Superman lies in its radiation, which is harmful to Kryptonians. When Superman is exposed to kryptonite, he experiences a range of negative effects, including:


1. Weakness: The most common effect, making Superman as weak as a normal human.

2. Poison: In some versions, kryptonite can be a direct poison, causing Superman physical harm or even death.

3. Various Colors: Kryptonite comes in different colors, each with a unique effect on Superman. For example, green kryptonite is the most well-known and causes weakness, while red kryptonite can alter Superman's emotions or induce hallucinations.

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Superman (and, Kryptonians) has superpowers on Earth because of our yellow Sun (Krypton's Sun was red). Kryptonite blocks that ability. Also, its radiation is poisonous to Kryptonians which can kill them (although, I have read comics in which Superman had developed some immunity against green Kryptonite).read more >>