Nioxin Scalp + Hair Thickening System 1 Shampoo | For Natural or Untreated Hair with Light Thinning | Niacinamide & Biotin | 33.8 Fl oz

Gentle detox for fine, natural hair

Starting with a clean scalp helps hair look fuller. Nioxin System 1 is a detoxifying cleanser designed for natural, untreated hair with light thinning. Clinically and dermatologically tested, it removes buildup without stripping essential oils, supporting a healthier scalp environment where hair can appear more voluminous and resilient.

What makes System 1 stand out

• Detoxifying shampoo for fine, non-chemically treated hair with light thinning
• Removes product buildup, minerals, pollutants, and toxins from scalp and hair
• Clears nutrient pathways at follicle sites while preserving natural oils
• Nioxin Density Protector technology adds resilience and smoothing control
• Visible results can appear as early as 30 days for some users

How it works and how to use

The formula uses a concentrated blend of botanicals and humectants to leave hair with body, volume, and shine. Use daily: apply to wet hair, massage into scalp and hair, lather for 1 minute, rinse thoroughly. For best results, pair with Nioxin System 1 Scalp Therapy Conditioner and Scalp and Hair Treatment.

• Apply to wet hair and massage into scalp and hair
• Lather for 1 minute and rinse thoroughly
• Follow with Scalp Therapy Conditioner and Scalp and Hair Treatment
• Aimed at gentle cleansing that supports a healthier scalp environment

What you may notice

In consumer studies, many users reported improvements in hair appearance and fullness after regular use:

• Up to 85 percent noticed a thickening effect
• Approximately 80 percent noticed increased density
• About 80 percent noticed fuller looking hair

About the brand

Nioxin brings 25 plus years of experience in thinning hair. The brand focuses on scalp health as part of overall hair care, with professional grade formulations designed for specific hair types and thinning patterns.