Male pattern balding may be due to stem cell inactivation

Using cell samples from men undergoing hair transplants, researchers compared follicles from bald scalp and non-bald scalp, and found that bald areas had the same number of stem cells as normal scalp in the same person. However, they did find that another, more mature cell type called a progenitor cell was markedly depleted in the follicles of bald scalp.

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