HASK Hair Oil, Keratin Smoothing Hair Treatment for Shine and Frizz Control, 12 Vials, Color Safe, Gluten-Free, Sulfate & Paraben-Free

I've been using Hask Keratin Smooth products for years; including the hair oil that comes in little vials. My stylist comments on the health of my hair every time I see her. Since I began to use this: no split ends, ever! It's super easy, just a few drops rubbed onto palms of hands then applied to hair ends. I have long hair so I do apply it to bottom third of hair length. Then dry, style as usual. And I use a clarifying shampoo every 2-4 weeks to avoid product build up.