its cheap - that's why it is being used as a foaming and cleansing agent.

as a pharmacist, i know its not good to mix this substance knowing its toxicity. so what i did is to call the attention of my supplier and talked with my friend (chemist) about this.

They told me that shampoo only contains 15% SLS and its mainly tolerable...bsides it comes in contact with the scalp for just a few minutes and is diluted with water while in use.