The Nioxin System 1 Shampoo + Conditioner Duo pairs the System 1 Cleanser Shampoo with the System 1 Scalp Therapy Conditioner — a two-step hair and scalp care system formulated specifically for natural, untreated hair with light thinning. It is not intended for color-treated hair, which Nioxin addresses separately with its System 3 and System 4 lines.
The shampoo uses a sulfate-based cleansing system (sodium laureth/lauryl sulfate, cocamidopropyl betaine) with peppermint oil, wild mint oil, menthol, and salicylic acid to clear scalp buildup and refresh the scalp. The conditioner is lighter-weight, built on cetyl and stearyl alcohols with bis-aminopropyl dimethicone, and carries the same peppermint/wild mint complex plus niacinamide, biotin, panthenol, and a mix of botanical extracts meant to nourish the scalp without weighing down fine hair.
This duo covers the shampoo-and-conditioner portion of Nioxin's three-part System 1 regimen; it does not include the separately sold System 1 Scalp & Hair Treatment leave-in step. Used consistently, Nioxin positions the full system as a way to help fine, thinning natural hair look fuller over time; as a two-piece duo, it functions as a scalp-focused cleanse-and-condition routine for hair in the early stages of thinning.
