JABS of blood into the scalp may help tackle hair loss in women and men, reports the Journal of Cosmetic Dermatology. The jabs contain platelet-rich plasma (PRP), made by spinning a sample of the patient's own blood in a centrifuge to separate red blood cells and leave proteins, said to be rich in growth factors that help reverse damage to hair follicles. The PRP is then injected into the scalp. Researchers from the University Hospital Cologne reviewed 13 trials involving 356 people and concluded the treatment increased hair density, compared to a placebo, with no adverse effects.

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