NEW, NEVER USED A lightweight, leave-in treatment for hair thinning — thicker, fuller-looking hair in 90 days. The Stem Cell Scalp Serum is rich in phytonutrients that have been studied and shown to have incredible longevity properties, revitalizing hair stem cells and protecting the scalp microbiome. With the added benefits of Aloe Vera (1%) and Bamboo Extracts (2%), this scalp treatment works to hydrate the scalp to provide the optimal environment that supports hair follicle health and fortifies roots for fuller + thicker feeling hair with overall less shedding.