This spray has tetrapeptides, which help prolong the growth phase. Neoruscine and nicotinamide assist in ferrying nutrients into the “bulb” of the hair, where the follicle is created.
Glytone By Ducray Neoptide Hair Lotion Spray , $95, dermstore.com
The doctor behind MD Lash, the popular lash-growing agent, started from scratch to create this scalp formula. Cytokines help with cell-to-cell communication—so the follicles get the message to produce. Antioxidants derived from ergothioneine soothe inflamed follicles.