Stimulates Scalp Rolling this derma roller over the scalp induces micropunctures a process known as microneedling which stimulates the activation of stem cells within the hair follicles This activation potentially triggers hair growth Boosts Growth When used consistently this derma roller enhances blood circulation and nutrient delivery to the hair follicles consequently fostering the growth of new hair Increases Absorption The effectiveness of this product relies on its ability to penetrate the scalp deeply Using this Derma Roller for Hair Beard Growth for men before applying oils or tonics facilitates enhanced absorption of the product into the skin Replaceable Heads Not only is this derma roller easy to use but it also features replaceable heads providing you with a backup set and extending the rollers lifespan for prolonged usage How To Use Clean your hair and beard area in sections In each section roll the roller upto 10 times back and forth Repeat on all sections Recommended Usage Once per week