Over time, your body’s stores of hyaluronic acid decline. Age is one reason, but environmental factors — such as smoking and air pollution — also accelerate this process. That’s the bad news. The good ...

November 24, 2025 • Our annual reading guide returns with 380+ new titles handpicked by NPR staff and trusted critics. Find 13 years of recommendations all in one place — that's more than 4,000 great ...