OUAI Fine Hair Shampoo — Biotin Thickening Shampoo 32 oz, Lightweight Volumizing & Color-Safe with Keratin & Chia Seed Oil

This formula combines biotin, hydrolyzed keratin, and chia seed oil to lift roots, improve strand resilience, and leave hair feeling fuller while remaining safe for color-treated and chemically processed hair. The sulfate-free blend cleans gently, preserves color, and pairs with OUAI conditioners and styling products for enhanced body and texture.

How does this shampoo add noticeable volume to fine hair?

OUAI Fine Hair Shampoo targets root lift and overall body by using ingredients that plump and strengthen strands without heavy oils. It cleanses buildup that flattens hair and deposits conditioners that don’t sit on the surface, so volume lasts after styling.

• Biotin supports thicker-feeling strands for improved fullness.
• Hydrolyzed keratin smooths cuticles for reflective shine and manageability.
• Chia seed oil adds slip and light thickness without weight.
• Sulfate-free surfactants remove residue gently to preserve lift.

Is it safe for color-treated or chemically processed hair?

Yes — the formula avoids sulfates, parabens, phthalates, and gluten, making it gentle on color and compatible with keratin and other salon treatments. It cleans without stripping dye or disrupting chemical services when used as directed.

• Color-safe, helps maintain vibrancy between salon visits.
• Formulated for keratin- and chemically-treated textures.
• No harsh detergents that accelerate color fade.

How should I use it to get the best thickening effect?

Apply a small amount to wet hair, focus on massaging the scalp and roots, then work the lather through mid-lengths and ends. Rinse thoroughly and follow with OUAI Fine Conditioner to lock in volume; finish with a lightweight styling spray for added lift.

• Massage at roots to stimulate lift and remove buildup.
• Use sparingly on ends to avoid any potential weigh-down.
• Pair with OUAI Thickening Spray and Fine Conditioner for maximum body.

What sensory experience and scent can I expect?

The shampoo offers a fresh, Mercer Street fragrance profile that blends bright citrus with soft florals and white musk for a modern, layered scent. The texture rinses clean and leaves hair with a lightweight, touchable finish rather than a heavy residue.

• Mercer Street scent: Italian lemon, iris, and white musk.
• Light, slip-forward texture that rinses cleanly.
• Leaves hair manageable and primed for styling.

Who is this for? OUAI Fine Hair Shampoo is formulated for people with naturally fine, flat, or thinning hair who want a gentler clean that amplifies body and reduces breakage. It's suitable for women and men, including those with color-treated or chemically processed hair, who prefer lightweight formulas and enjoy a layered salon-inspired fragrance.

Ingredients

Water/Aqua/Eau, Sodium C14-16 Olefin Sulfonate, Cocamidopropyl Betaine, Sodium Methyl Cocoyl Taurate, Peg-200 Hydrogenated Glyceryl Palmate, Cocamide Mipa, Fragrance / Parfum, Panthenol, Cocoglucosides Hydroxypropyltrimonium Chloride, Hydrolyzed Keratin, Biotin, Salvia Hispanica Seed Oil, Cetrimonium Chloride (Anti-Static Agent/Agent Antistatique), Hydroxypropyl Guar Hydroxypropyltrimonium Chloride, Glycerin, Sodium Lauroyl Glycinate, Peg-150 Distearate, Propoxytetramethyl Piperidinyl Dimethicone, Trideceth-6, C11-15 Pareth-7, Peg-7 Glyceryl Cocoate, Sodium Chloride, Polyquaternium-7, Disodium Edta, Citric Acid, Sodium Hydroxide, Tetrasodium Edta, Potassium Sorbate, Sodium Benzoate, Phenoxyethanol, Benzyl Alcohol, Acetic Acid, Sodium Acetate, Benzyl Salicylate, Limonene, Hexyl Cinnamal