Use better products, get better hair. That’s our Theorie. Theorie Argan Oil Restoring Hair Serum strengthens, shields and hydrates all hair types. Infused with nutrient-rich argan oil, rich in antioxidant vitamin E and fatty acids, to restore softness, strength and shine to damaged strands. This heat protectant serum is quickly and easily absorbed to lock in moisture. Hair is renewed from within, leaving long-lasting smoothness and shine. Frankincense essential oil also helps improve the condition of hair.