News came through this week of three human trial subjects suffering alopecia areata who grew back a full head of hair within five months. It has certainly flared up a lot of excitement, and these three people are reportedly very happy with the results. But how has this happened, and does it mean that we could kiss goodbye to baldness for good?

Believe me when I say the investigation into this one has been a real challenge. Biochemistry doesn't come naturally to most people, myself included, so...
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