Scalp Concentrate with PHT Active Ingredient Complex for Treating Tonsurs and Secret Corners, Stimulates New Hair Growth. 100 ml bottle with applicator for precise application on the scalp, suitable for daily use. Used in genetically (hereditary) or caused by stress and tension and after pregnancy. Stop&Grow PHT complex was studied by the dermatological clinic at the University of Lübeck: up to 23% more hair growth - this is up to 14,000 visible new hair after 90 days. Up to 7 times stronger effect than other hair growth active ingredients. Often used after intensive treatment with Stop & Grow Elixir and in combination with Stop & Grow Shampoo or Tonic.