Did you know? In your 40s and beyond, the diameter of your hair naturally gets thinner over time. Designed with this in mind, Pantene Pro-V AgeDefy Advanced Thickening Treatment helps address this natural thinning of the diameter by making your existing hair strands thicker. The Pantene Pro-V Expert Collection is a premium line born from our Swiss heritage and has been specially crafted for those who seek an exceptional level of care. Pro-V AgeDefy Advanced Thickening Treatment has been designed with Olay experts to thicken each existing individual hair strand and delivers a potent blend of vitamin B3, panthenol, and caffeine deep within the hair, providing suppleness. The treatment works on the surface of each hair strand, for natural-looking hair with fullness that lasts, adding thickness to existing hair fibers. Incorporate into your daily ritual and notice instantly fuller-looking and thicker-feeling hair. Reach full, luxurious fiber thickness in 14 days, then maintain with daily treatment. Day 1: Thickens existing hair, so it s as if you have up to 6500 more hair strands. Day 14: Hair achieves maximum thickness. Day 30 & Beyond: Hair is supple and maximum thickness is maintained. Signs or changes you may experience as you use this treatment* (*vs. untreated): Less hair in your brush due to breakage, more texture for hair that is less limp, natural-looking hair with fullness that lasts and Hair that is more supple and easier to manage.Thickens existing hair so it's like you have up to 6500 more hair strands.