Hair care tips that everyone can use

While hair care is mostly an experiment of one, here are the general rules that everyone can use to maintain beautiful, healthy-looking hair.

Why does your hair turn gray?

It's well-known that a reduction of pigment will make your hair turn gray - but why this happens remains somewhat of a mystery.

Interactions may matter most for longevity

A study of the biology of aging shows that complex interactions among diet, mitochondrial DNA and nuclear DNA appear to influence lifespan at least as much as single factors alone.