This leave-in formula addresses the three main causes of hereditary, hormonal hair thinning to help preserve existing hair while helping existing thin, sparse hair. 30-day supply. No-rinse, solution for progressive, hereditary hormonal hair thinning. Addresses the three main factors that contribute to this type of thinning hair. Single-dose ampoules and stimulating massage applicator tip for easy, precise and controlled application to the scalp.