AMINO ACID

can be derived from animals, plants, or be synthesized. They are used in¬†cosmetics, vitamins, supplements, shampoos,¬†and more. Please contact the manufacturer for more information, and good luck. I contacted Kiehl’s to ask what kind of Amino Acids are used in their Amino Acid Shampoo. A Kiehl’s consumer affairs agent told me: “We don’t have information to share with you in regards to the source of that ingredient.”

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