Are You Eating Too Much Protein? Scientists Finally Weigh In

Ask anyone who lifts regularly how much protein they get each day, and you’ll probably hear anywhere from 1.2 to 2 grams per kilogram of body weight. If you’re 150 pounds, that’s about 136 grams—and plenty of serious lifters go well beyond that. But for years, people have asked: Is that even healthy?

Rumors have circulated for decades, claiming that too much protein could damage your kidneys, stress your liver, or even weaken your bones. But new research shows there’s no solid evidence that high-protein diets are harmful...