Instant volume and growth promoting thickening treatment for color-treated hair. Promotes healthy hair growth. Adds instant volume and long-lasting body. Key Ingredients Saw Palmetto inhibits DHT, the hormone linked to hair loss. Rosemary Extract stimulates dormant hair follicles on the scalp. Thickening Polymers deposits microscopic thickening dots between strands so hair looks and feels fuller. How to use Apply treatment foam directly to scalp and root area only. Massage in, do not rinse.