Why does hair turn silver with age? Discovering the root problem of graying

Ever wondered why your hair turns gray as you age? A team of researchers says it has identified the root cause as trapped stem cells — and that means new tips for naturally fending off grays from your mane could be coming soon.

It all starts with a type of stem cell called melanocytes, also known as McSCs.

That melanin is key to hair color. McSCs hang around in your hair follicles, where they receive a protein signal that tells them when to become mature cells. Mature cells release pigment and, voilà, you get your hair color.

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“Some people think sun exposure can damage their melanocytes more or less,” [dermatologist Jenna Lester] said. “And hormones also play into it as well.” Then there’s stress, genetics and certain medical conditions, which can all strip hair of its richer hues.

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Overall, 74% of people between the ages of 45 and 65 years of age have at least a few silver strands, according to research from the National Institutes of Health.

If you’re in that camp and resenting it, this new study could be a reason to rejoice: The researchers say that moving the McSCs to their proper location could prevent graying.

This is an excerpt. Read the full article here