OUAI Scalp Serum for Thicker, Fuller-Looking Hair 2oz

Healthy Hair Starts with the Scalp

OUAI Scalp Serum is a skincare-inspired hair treatment unlike anything else in your routine — because it gets to the root of healthy hair, literally. Created by celebrity stylist Jen Atkin, this serum treats your scalp the way you'd treat facial skin: hydrating, balancing, and creating an ideal environment for hair to thrive, rather than treating just the strands.

Powered by a blend of adaptogens — Arctic Root, Siberian Ginseng, and Chaga Mushroom — combined with Hyaluronic Acid, this serum delivers deep, lasting hydration to a dry, irritated scalp. Red Clover Extract helps reduce scalp discomfort, while peptides support the appearance of thicker, fuller, healthier-looking hair over time. Clinically proven and safe for all hair types, including color-treated, keratin-treated, and chemically processed hair.

Clinically Proven Results (16-week study, 32 subjects):

100% of users showed improvement in the look of fuller, thicker hair
90% of users showed improvement in scalp health

Key Benefits:

Supports the appearance of thicker, fuller-looking hair
Balances and hydrates the scalp
Helps soothe irritation and discomfort from styling
Creates a healthy scalp barrier
Suitable for all hair types and textures
Safe for color-treated, keratin-treated, and chemically processed hair
Sulfate-free, paraben-free, phthalate-free, vegan, gluten-free
Featuring OUAI's signature Cape Town scent — earthy notes of ginger and spearmint