The DE|RIVE®MD Hair Support Serum is a clinically tested, 100% plant-based, vegan, and all-natural formula made without synthetic ingredients, designed for topical use only. Each bottle supports a healthier-feeling scalp environment and the appearance of thicker, fuller hair — clinically tested with patient-reported satisfaction at the heart of every result. 60 mL (2.03 fl. oz.) of concentrated scalp and hair support.