SATURDAY, June 7, 2025 (HealthDay News) — You're not just getting older, you're probably getting bigger.

Between their 20s and 40s, most Americans can expect to put on 10 to 25 pounds — and after 30, exercise may not have the same payoff it once did.

It's not just you, but Mother Nature at work.

"Your metabolism tends to slow down as you get older, but your appetite and food intake do not," said Rafael de Cabo , an expert on aging at the National Institutes of Health (NIH). "So you have a steady increase of body weight with age."

Unfortunately, most of that gain is fat tissue, which settles around your internal organs, secreting chemicals that boost the risk for heart disease and diabetes .

At the same time, lean muscle begins to disappear, especially when folks become less acti

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