What makes shampoo different from soap?
Hair reacts to certain oils quite differently than does the skin. Therefore, the fats used to create a gentle-but-cleansing shampoo are very different from what is needed to create a gentle-but-cleansing skin formula. Castor oil is not often used in significant quantity in a skin formula, because it creates a soft bar of soap that can leave a sticky after-feel on the skin. In a hair formula, it cleanses, moisturizes, provides shine and gives a “bouncy” quality to the hair. In general, soap formulas can be used on the hair and shampoo formulas will work for the body. However, there will be differences in your results. A soap formula used on the hair may leave a bit of a waxy film, and a shampoo formula used on the body may be drying.
