Nioxin System 1 is a three-part scalp and hair care system from Nioxin, built specifically for natural, chemically untreated hair that is showing early, light thinning. The kit pairs a Cleanser Shampoo and Scalp Therapy Conditioner with a leave-on Scalp & Hair Treatment, rather than relying on a single shampoo to do the work.
The formula is built around niacinamide, caffeine, and peppermint and wild mint oils, alongside botanical extracts like green tea, nettle, and hops. Nioxin's own clinical testing on the line reports visible improvements in hair thickness and density within about 30 days of consistent use.
Because System 1 is designed for hair that hasn't been colored, permed, or chemically relaxed, it isn't the right match for treated hair — Nioxin makes separate systems for that. It's intended for anyone, regardless of gender, whose thinning is still in its earliest, lightest stage.
- Cleanser Shampoo: massage into wet scalp and hair, lather about a minute, rinse thoroughly
- Scalp Therapy Conditioner: distribute through scalp and hair after cleansing, leave 1-3 minutes, rinse
- Scalp & Hair Treatment: apply directly to the scalp and leave on, no rinsing needed
Nioxin recommends using the full three-step system at least three times a week, with the leave-on treatment suitable for daily use; some users notice mild, temporary tingling or redness from the peppermint and menthol, which fades on its own.
