For decades, the advice for thinning hair barely changed. Take a pill with side effects. Rub on a foam you can never stop using. Or save up thousands for a transplant.
Then a quiet shift happened in Korea, the most advanced beauty market on earth, and it's now making its way to the US. The approach is so simple that it caught even longtime skin and scalp experts off guard: stop treating the hair, and start treating the scalp it grows from.
Here are the 7 reasons it's spreading so fast.