Purezero Biotin strengthening shampoo, It needs help to maintain its strength. By blending concentrated protein in the formula, The Purezero Biotin collection delivers the help you need and leaves you with strong, resilient hair. Game, set, match. Proudly made in the USA. GENTLE & WELLNESS FORMULATION: All Purezero collections use Zero: Sulfates, Parabens, Dyes, Gluten, Phosphates & Phthalates. Our formulas are 100% Vegan and NEVER test on animals. Purezero is a proud member of PETA’s Beauty Without Bunnies Program. SALON INSPIRED, CLEAN INGREDIENTS: Purezero is the first to bring real salon performance and clean haircare together. With our proprietary formulas, you no longer need to trade performance to use a clean product. Pure ingredients, Zero concerns. It’s that simple!. BIOTIN BENEFITS: Biotin, the hero essential vitamin that promotes hair growth, hair volume, thickness and strength while reducing hair breakage and frizziness. What more can you ask for?. STRENGTHEN & REPAIR: Purezero Biotin Collection is a sensual and unique formula that strengthens your damaged hair from the inside out. Biotin will immediately be injected into your strands, maximizing strength, elasticity, youthfulness, and hydration resulting in soft, strong and healthy hair.