NIOXIN System 4 Leave in Treatment Scalp + Hair Thickening 3.3 fl ozDesigned for dry, damaged, colored hair with progressed thinning. Clinically and dermatologically tested, the hair thickening treatment nourishes and strengthens each strand of hair from root to tip, resulting in thicker, fuller hair while providing UV protecting ingredients for the scalp and hair. Thickens the hair: Nioxin System Kit 4 is clinically designed to add thickness and fullness to dry, damaged, color treated hair with progressed thinning,

The color fades beautifully and true-to-tone

avoiding mud

timing notes

and silkiness while improving the long-term health of damaged strands

DISODIUM EDTA

What you get

Hydrolyzed Milk

transparent micro-particles give hair texture and grip

Diffuse to enhance curls or let air dry for a more relaxed look

Castor Isostearate Succinate

Prunus Amygdalus Dulcis (Sweet Almond) Oil*

A season-aligned hair color direction you can commit to with confidence