你到底需要多少蛋白质？

IT’S THE NUTRIENT DU JOUR, showing up in everything from snack chips and cereals to powders and shakes. Even the government says we should put more focus on it. But while the health benefits are real, so is the hype. Here’s everything you need to know about protein—and why the source matters. BY RACHEL MELTZER WARREN / ILLUSTRATIONS BY ROELIEN IMMELMAN Protein is having quite a moment. Its reputation as a star nutrient—one that can keep our muscles and bones strong and our energy up, and help us age well and stay at a healthy weight—has made it a major focus of nutrition advice and food manufacturer marketing. …