OUAI Scalp Serum — Balancing Scalp Treatment 2 fl oz with Hyaluronic Acid & Peptides for Fuller-Looking Hair

OUAI Scalp Serum is a skin-care-inspired balancing serum formulated to hydrate the scalp, support fuller-looking hair, and reduce surface discomfort with red clover, Siberian ginseng and peptides.

This lightweight, fast-absorbing scalp serum brings OUAI's hair-by-way-of-skin approach to daily scalp care. Designed to create a healthy moisture barrier while delivering targeted conditioning ingredients, the formula pairs hyaluronic acid with adaptogens like arctic root, chaga and Siberian ginseng plus peptide technology and red clover extract. It is free of parabens, phthalates and sulfates, scented with OUAI’s signature Cape Town fragrance, and packaged as a convenient 2 fl oz dropper bottle for at-home use.

How does this serum hydrate a dry or flaky scalp?

The serum uses hyaluronic acid to attract and retain moisture at the scalp surface while forming a light, breathable barrier. Adaptogenic plant extracts help condition the skin environment so strands can sit in a balanced, hydrated setting without feeling greasy.

• Hyaluronic acid for moisture retention
• Adaptogens (arctic root, chaga, Siberian ginseng) to support scalp comfort
• Light, non-oily texture that absorbs quickly
• Daily-use compatibility with most hair-care routines

Will this serum make my hair look thicker and fuller?

The formula is crafted to help hair appear denser and more volumized by improving the scalp environment and reducing visible gaps between strands. Peptides and red clover extract work alongside hydration to support the appearance of fuller-looking hair over time when used consistently.

• Peptides to support hair-fiber resilience
• Red clover extract for scalp-targeted support
• Daily application helps create the look of increased density
• Compatible with styling products and color-treated hair

How do I use the OUAI Scalp Serum in my routine?

Apply the serum directly to a dry or damp scalp using the dropper, parting hair into sections to target specific areas. Gently massage to distribute the product, leave in—no rinse required—and style as usual; for best results, incorporate into a daily or nightly ritual.

• Use the dropper to apply 3–6 drops per section as needed
• Massage briefly to encourage absorption and circulation
• Leave in; safe to follow with regular styling products
• Use daily for consistent scalp care benefits

Is this serum safe for colored, curly, or sensitive scalps?

The serum is formulated without parabens, phthalates and sulfates and is lightweight enough for a range of hair textures and treatments. Because sensitivities vary, test a small area first if you have a known scalp condition or severe sensitivity, and consult a professional when in doubt.

• Free from parabens, phthalates and sulfates
• Designed for all hair types, including chemically treated hair
• Non-greasy formula suitable for fine and coarse textures
• Patch test recommended for very sensitive scalps

Who is this for: OUAI Scalp Serum is for anyone looking to make scalp health part of their hair-care routine—people seeking daily hydration, a lighter-feeling alternative to heavy oils, or products that support the look of fuller hair. It suits those who prefer thoughtfully formulated, fragrance-forward solutions and who want an easy in-home step to complement their shampoo, conditioner and styling lineup.

Ingredients

Aqua / Water / Eau, Polysorbate 20, Butylene Glycol, Glycerin, Polyquaternium-7, Rhodiola Rosea Extract, Sodium Hyaluronate, Tocopheryl Acetate, Acetyl Tetrapeptide-3, Tocopherol, Rosa Centifolia Flower Extract, Dextran, Trifolium Pratense (Clover) Flower Extract, Acanthopanax Senticosus (Eleuthero) Root Extract, Rhaponticum Carthamoides Root Extract, Inonotus Obliquus (Mushroom) Extract, Selaginella Lepidophylla Extract, Ethylhexylglycerin, Disodium Edta, Sodium Hydroxide, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Citric Acid, Sodium Benzoate, Phenoxyethanol, Fragrance / Parfum, Eugenol, Limonene, Linalool.