Progaine's volumizing shampoo is designed to gently cleanse the hair in a way that optimizes fine or thin hair, according to ShampoosForHairLoss.com. It utilizes a special formula that deeply penetrates each hair follicle to give strength from the inside out.
The shampoo is intended to give weightless body to hair, which makes it look fuller and thicker. A product of years of studies and research, Progaine helps to hide hair loss by giving each individual strand more volume. It is even safe for color-treated hair. While the product does claim to give hair a fuller appearance, it does not contain the same hair-regrowth ingredient found in Rogaine.