1oz/30ml. New with box Healthy hair starts at the scalp, so get to the root of thinning and fall out with Act+Acre's bestselling treatment serum.Formulated with 2% Swiss apple stem cells to repair the scalp microbiome at a cellular level, the Cold Processed Stem Cell Scalp Serum works to reduce hair shedding within one month of use. These hard-working stem cells have been clinically-proven to stimulate growth and extend the growth phase of your mane, leading to a fuller head of hair over time. Combined with collagen-supporting and scalp-soothing aloe vera and bamboo and pea extracts - known to promote a consistent growth cycle and reduce production of ageing free radicals - this vegan treatment is set to be your new hair care hero.