There are several benefits to using horse shampoo on human hair, including increased thickness, beautiful color, and rich shine. First created in 1970, this shampoo was originally intended for use on horse hair, but humans have found it very beneficial to their own hair. It was made to beautify and tame the most unruly hair on horses, but horse owners began to realize that it could moisturize, clean, and thicken their hair as well. As more and more horse owners began to use the shampoo for their own scalp, it became known as a secret to lush, healthy hair.