Following is a transcript of the video. Nico: Today I'm gonna be testing out four temporary hair dyes. I'm somebody who does not want to permanently dye my hair, but these temporary dyes could be ...

Dye is temporary. (And messy ... The result could mean slowing, and one day even reversing, gray hair. Here’s the idea behind all the geeky science—and what to do until it becomes reality.

Beyond only covering grey hair, semi-permanent hair colours have ... throughout the transition from permanent color. Like ...

“I went gray prematurely in my early 20’s… and dyed my hair every color along the way until I couldn’t tolerate the toxicity of the dyes any more,” Grant went on to explain. “In my 30 ...