I reassured him and sent him to get another blood specimen drawn without a tourniquet. Why? Because I suspected that the ...

Hoping to catch serious illnesses early, more Americans are ordering lab tests online, but their doctors don't know what to ...

Famed biohacker Bryan Johnson and his Blueprint team devised this measure of harmful plastic particles in your blood.

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." It may feel nearly impossible to scroll through social media these days without seeing ads for trendy, ...