Redken Acidic Grow Full Scalp & Hair Serum fortifies thinning, fragile strands with a concentrated dose of scalp-stimulating care that helps promote healthier-looking growth. This pH-balanced, leave-in formula boosts density, reinforces weak hair, and delivers weightless volume for a fuller, stronger look. pH balanced Leave-in, no-rinse application Who Is It For? All hair types Ideal for thin or fragile hair What Does It Do? Reinforces weak strands Boosts density and volume Nourishes and rebalances scalp Supports healthier-looking growth Reduces appearance of breakage How Do You Use It? After rinsing conditioner, on damp hair, spray onto the roots Use fingers to massage into scalp Do not rinse Style as usual