* Hyaluronic Acid: This is a humectant, meaning it attracts and retains moisture. It's used to hydrate the hair and scalp, reduce dryness, and add shine.
* Amino Acids: These are the building blocks of proteins, and hair is primarily made of keratin (a protein). Amino acids can help repair damaged hair, strengthen the hair shaft, and improve elasticity.
* Glycolic Acid: This is an alpha-hydroxy acid (AHA) that can exfoliate the scalp, removing dead skin cells and product buildup. This can improve scalp health and potentially promote hair growth. It's also used in some hair smoothing treatments.
* Lactic Acid: Another AHA, lactic acid is gentler than glycolic acid. It also exfoliates the scalp and can help balance pH levels.
* Citric Acid: This is used as a pH adjuster in many hair care products. It can also help to brighten hair and remove mineral buildup.
* Salicylic Acid: A beta-hydroxy acid (BHA), salicylic acid is primarily used for scalp treatments to address dandruff, seborrheic dermatitis, and psoriasis. It exfoliates the scalp and can help to unclog hair follicles.