COLLAGEN BOOST SERUM 3.4OZ. Benefits: Helps repair and prevent damage, boosting moisture and gloss for visibly more vibrant hair. Helps repair damaged, unruly hair shafts and seals split ends with Black Oat. Protects from heat damage with hot tools up to 455F with Natural Chia Complex. Research Results: Smoothes hair and helps maintain strong, resilient, healthy-looking hair. Improved up to 92% of split ends instantly. Up to 78% stronger hair. Up to 48-hour frizz control in extreme humidity, leaving hair softer and smoother. Instantly add a vibrant, polished finish with a boost of shine. Great for all hair types. *Based on breakage test using Hot Tools QuietAir Dryer at max temperature and then Flat Ironed up to 455F with the Evolve Flat iron vs untreated hair. Formulated Without: Silicone. Phthalates. Parabens. SLS & SLES Surfactants. DEA.