Health & Beauty > Personal Care > Hair Care > Hair Styling Products Beauty > Hair > Hair Serum & Hair Oil in stock Act + Acre Cold Processed Hair Oil: This gorgeous, multitasking hair oil renews and restores with only five plant-based ingredients. Argan oil nourishes to revive split ends, meadowfoam seed oil moisturizes for elasticity, and squalene protects against UV light and heat styling. You can use it four different ways: Smooth it into hair prestyling, layer it on top of a hair mask, leave it on as an overnight treatment, or twist it into your ends as a finishing touch. A little goes a long way—we recommend one drop for fine hair, two to three drops for medium hair, and four to five drops for coarse hair—and the result is shiny, soft, moisturized hair that’s healthy-looking and beautifully protected.65 mL / 2.2 fl oz Made in USA Need help figuring out where to add this into your routine? Have a specific question? Send a message over to personalshopping@goop. com.