Glycerin soap is a very gentle and moisturizing cleanser and can definitely be used as shampoo. Soap containing glycerin is an ideal all-over body cleanser.
Clearly Natural, a popular producer of glycerin soaps, recommends the mild soap bars for the face, hands and body; the products are nondrying and will not leave skin or hair dry or itchy. In fact, the humectants in glycerin actually retain moisture.
According to the Mayo Clinic, humectants "are substances that absorb water from the air and hold the moisture in the skin… (and) are also useful in softening thickened or scaly skin". Glycerin is a natural humectant and is a common ingredient added to commercial shampoos for moisture.
Glycerin soaps rinse easily without leaving a sticky residue or coating on your skin or hair, unlike many shampoos.
Clearly Natural soaps do not contain Sodium Lauryl or Laureth Sulfates, harmful and color-stripping chemicals found in many drugstore brand shampoos.
Glycerin soap is ideal for people with sensitive skin. Soap bars manufactured by Clearly Natural are hypo-allergenic, without added fragrance or dyes.