Can sea vegetables reverse gray hair?

Sea vegetables have come up a lot this last week and—to cut right to the beauty benefits—several people have told me that they can prevent, and even reverse, gray hair.

What Experts Want You to Know About Female Hair Transplants

An unrecognizable male hairdresser combs the dried hair of middle aged blond woman sitting sideways
Photo credit: Stocksy / Asya Molochkova

The Top Hot Tool Mistake You’re Probably Making—And How to Fix It, According to a Haircare Brand Founder