As a domain expert in the field of comic book lore and the fictional universe of Marvel Comics, I can provide an answer to your question about Magneto's powers.

Magneto, a character from the Marvel Comics universe, is a mutant with the ability to control and manipulate metal. His powers are not limited to just attracting or repelling metals; he can also manipulate the magnetic fields around him to achieve various effects. However, the concept of controlling blood is a bit more complex.

Blood is primarily composed of water, which contains trace amounts of iron. While it's true that Magneto could potentially influence the iron in the blood, the amount is so small that it's unlikely to have any significant effect. Additionally, Magneto's powers are typically portrayed as being used on larger, more concentrated sources of metal, such as steel beams or entire metal structures.

In conclusion, while theoretically possible, it is highly improbable that Magneto could control or manipulate human blood to any practical extent due to the minimal iron content and the nature of his powers.

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Magneto can levitate people because water is diamagnetic. With a strong enough magnetic field, scientists have levitated animals like frog. Since magneto has ridiculous amounts of electromagnetism, he can lift a human without any iron content. ... He was able to manipulate even the small traces of iron in a person's blood.read more >>