@johnwf The research says that a chemical ("choline") that appears in eggs also appears in elevated levels in the bloodstream for people with more-serious types of prostate cancer.

That's not proof that eggs are dangerous for prostate cancer, though, especially since the liver regulates choline levels, and can even synthesise some if it gets too low (choline is an essential nutrient; you'd die without it).

The main question is whether high levels of egg consumption cause prostate-cancer recurrence, or whether it's just an accidental correlation: after all, people who consumed a lot of eggs in those studies were also more likely to smoke, ate more red meat, and were more likely to be inactive. So far, none of this has been established in a proper clinical trial.

p.s. Beef liver is also a big source of choline.