The secret to stronger, whiter, healthier teeth has been hidden on the top of our heads this entire time.

Researchers from King's College London have devised a way to use a common protein found in hair to help regenerate tooth enamel; the substance that keeps people's pearly whites strong and pearly.

Teeth aren't bones – a vital distinction that isn't just for pedantry, but an explanation for why they don't regenerate when lost or broken. So when tooth enamel erodes through diet, lapses in oral hygiene, or even aging, exposing the softer, pale yellow dentin beneath, it's the start of a permanent destruction .

Dental decay can weaken a tooth's strength and stiffness (ability to resist deformation) by up to 95 percent , leading to persistent pain and loss of function. The resul

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