We tend to think aging wears us down little by little. But your immune system has two turning points when that process speeds up. Here’s what changes your defenses, and how to give them the support they need.

Most of us think aging moves in only one direction. But after just four weeks of eating differently, older adults showed signs of a younger biological age. And get this: the diet with the clearest results may challenge what you’ve heard about eating for longevity.

From fibermaxxing to sleepmaxxing, everyone is looking for a way to get more out of healthy habits. Now whole grains may be having a “maxxing” moment of their own, with heart benefits validated by 87 clinical trials.

Protein is everywhere right now — but researchers are asking whether constantly adding more is really the best strategy for healthy aging. A major review suggests that, for some people, the answer may lie in doing the opposite.

Vitamin C was largely written off as a cancer treatment decades ago. Now scientists are revisiting the story — and one overlooked difference may explain why the question never really went away.

For decades, you probably chose low-fat milk and yogurt to protect your weight and cholesterol. But when researchers had people eat three servings of full-fat dairy every day, what happened wasn’t what conventional wisdom would predict…