Could Eating Less Protein Actually Help You Live Longer?

Maxxed Out: The proteinmaxxing craze is still going strong, with protein showing up in everything from cereal to coffee to water. And while the current Dietary Guidelines for Americans encourage people to eat more at every meal, a massive new review argues that more protein isn’t automatically better, especially for people who aren’t very active.

The Study: The paper reviewed more than 350 studies on species as varied as flies and humans. In animal studies, less protein meant longer lives. In some human trials, people on protein-restricted diets lost weight and body fat, and their fasting blood sugar improved, even when they ended up eating more calories overall. Part of the explanation may come down to FGF21, a hormone that rises when protein intake drops and may increase energy expenditure, improve blood sugar regulation, and reduce inflammation.

The Takeaway: Getting enough protein is still important for maintaining muscle, which can help support healthy aging and a longer health span. But people who aren’t exercising all the time or lifting weights don’t need to cram extra protein into everything they eat and drink. The standard recommended amount of protein is enough for most people.

Keep in Mind: Athletes and people who train regularly still benefit from higher protein intake, and cutting too much carries its own risks, like weaker immunity and lower bone density.