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A decade later, the Crossley Xervac used vacuum suction to stimulate hair growth -- you could rent one for home use or get the same treatment in a barbershop.Fast-forward to today. Medications such as minoxidil (Rogaine and other brands) and finasteride (Propecia) provide two methods for stemming hair loss, and hair transplant surgery -- first devised in 1939 Japan -- has become more aesthetically convincing and effective. Topical, nonpharmaceutical scalp-stimulating treatments are available and sometimes used in conjunction with other forms of hair loss treatment, including LLLT. Particularly since the FDA approved laser hair therapy as safe in 2007, that form of treatment has grown in popularity. Note that a safety approval is not an efficacy endorsement: The FDA is just saying it can hurt.After the individual hair follicles are isolated from the donor strip and the excess tissue removed, they are immediately inserted into pre-cut micro and mini slits or punctured holes that are strategically placed so as to give a natural and aesthetically appealing look to the hair that will grow in future from the transplanted follicles. An expert surgeon can place up to 50 grafts per square cm. The surgery does leave a scar in the donor area, but that gets covered once the hair grows fully.A far less invasive method of obtaining hair grafts for transplant is the follicular unit extraction (FUE) method. Here the surgeon examines the donor tissue under a microscope and selects individual follicular units and then plucks them out using a fine needle, eliminating the need to excise the skin from the back of the head.