Pork tenderloin is an excellent source of the vitamin B6 and the mineral zinc. Zinc is involved with tissue growth and repair, and it keeps the oil glands around the hair working properly. Low zinc levels can cause hair loss, dandruff, and slow growth. Low levels of the B vitamins can cause shedding, slow hair growth, and weak hair that is prone to breakage.
Here are some excellent recipes (with external links) using pork tenderloin. I have personally tried each of them, and found them to be quite delicious and simple to prepare: