Nioxin is the #1 Professional brand for thicker, fuller hair, dedicated to providing clinically proven solutions that turn scalp science into effective scalp care and hair thickening products. With a legacy of delivering visible results, Nioxin aims to help everyone achieve the hair they desire: thicker, fuller, and healthier. This System 1 is specifically designed for natural, untreated hair experiencing light thinning. It is clinically and dermatologically tested to nourish the scalp and strengthen each hair strand, minimizing breakage and enhancing hair body for a thicker, fuller appearance, with visible results in as little as 30 days. The advanced formula contains key ingredients like niacinamide, biotin, and caffeine, which work to nourish hair roots, stimulate follicles, and strengthen hair. It also features antioxidants and UV-protective ingredients to revitalize the scalp and improve its overall health and condition. Mentha Arvensis Leaf Oil (wild mint oil) is included for its refreshing and invigorating properties that stimulate the scalp and promote circulation. Caffeine further aids in stimulating hair follicles and maintaining skin health. This lightweight, leave-in treatment revitalizes and strengthens hair while promoting a healthy scalp environment, enhancing overall hair vitality and resilience.