research 15-deoxy prostaglandin J2, the nonenzymatic metabolite of prostaglandin D2, induces apoptosis in keratinocytes of human hair follicles: a possible explanation for prostaglandin D2-mediated inhibition of hair growth
A substance called 15-deoxy prostaglandin J2 can cause hair follicle cells to die, which might explain how prostaglandin D2 can lead to hair loss.
