(brizmaker/GettyImages) Multivitamins have ignited a fierce scientific debate over whether nutritional supplements are beneficial to our health or a multi-billion-dollar racket. A long-term randomized ...

Whether supplements can increase a healthy lifespan is an open question, however ...

Scientists found people taking a daily multivitamin showed slightly slower biological aging over two years, though the benefit appears small.

A daily multivitamin did not turn back the clock in any dramatic sense. But in a large clinical trial of older adults, it did appear to slow one version of aging that researchers can measure in blood.

It turns out that your body has more than one circadian clock. Different circadian clocks keep control of the circadian rhythms of different parts of your body, and they work best when they are all ...