Natural Moisturizing Amino Acids contains Methyl Paraben (0.25%), Propyl Paraben (0.25%). FDA to use not more than 0.25% of each type of weight for Natural Moisturizing Amino Acids The usage rate is listed below: 0.5-5% (3-5% for skin and 0.5-1% for leave-on hair). If I use Natural Moisturizing Ami...