Men with higher levels of testosterone are more likely to come down with the flu, a study in the Proceedings of the National Academy of Sciences suggests.
Researchers, led by Stanford Prof. Mark Davis, looked at how the immune systems of men and women reacted to a flu shot.
In men, the higher the level of male hormones, the less effective the vaccine.
“Men are suffering!” Davis tells NBC News. “Women are superior. There’s no way around it.”
“It could be food for thought to all the testosterone-supplement takers out there,” he adds.