OUAI Medium Shampoo - Hydrating, Strengthening & Shine Boost

In this review of OUAI Medium Shampoo the bottom line is simple: this is a targeted, sulfate-free cleanser for people with medium-thickness hair who want hydration without heaviness. The formula is built around weightless Babassu oil for scalp and strand moisture, Coconut oil to help seal split ends and reduce breakage, plus hydrolyzed keratin to tame flyaways and Kumquat extract for surface shine. For readers seeking a routine-friendly shampoo that prioritizes softness, manageability and a glossy finish, this product delivers the single biggest benefit: visible smoothing and hydration for hair that sits between fine and thick.

Key Features

• Sulfate-free cleanser: Gently removes dirt and buildup while keeping natural oils intact so medium strands stay hydrated and do not feel stripped.
• Babassu oil: Adds weightless hydration to both scalp and hair, helping to reduce dryness without leaving a heavy residue.
• Coconut oil: Works to strengthen hair by sealing split ends and reducing breakage over repeated use.
• Hydrolyzed keratin: Smooths the hair cuticle to reduce frizz and flyaways for a more polished look after styling.
• Kumquat extract: Leaves a shiny finish on the hair surface for improved brightness and a healthy appearance.
• Effortless routine: Designed to be easy to use in everyday wash days and to pair with the matching conditioner for best results.

Who It's For

This shampoo is best for people with medium-thickness hair who want a hydrating, reparative cleanse that improves manageability and shine. It suits those who prefer sulfate-free formulas and are looking to reduce frizz, strengthen strands, and address split ends without weighing hair down.

It is less appropriate for someone with very fine hair that reacts to oils by appearing flat, or for users who need an intensely clarifying shampoo to remove heavy buildup from styling products. Those seeking a drugstore price point may find it a bit premium, while users with very coarse or highly damaged hair might prefer a heavier treatment product in addition to this shampoo.

Pros & Cons

Pros

• Hydrating but lightweight formulation that boosts softness and manageability for medium strands.
• Contains keratin and oils that help reduce flyaways and strengthen hair, improving overall hair health feel.
• Leaves a noticeable shine thanks to kumquat extract and smoothing agents.
• Pleasant fragrance and perceived quality, with many users noting improved hair texture.

Cons

• Some users report mixed value for money and occasional dryness on sensitive scalps, so results can vary by individual.
• May be too rich for very fine hair that tends to look flat with oil-based ingredients.

Specifications

Product Type	Hydrating shampoo for medium hair
Key Oils	Babassu oil, Coconut oil
Active Protein	Hydrolyzed keratin
Botanical Extract	Kumquat fruit extract
Formula Notes	Sulfate-free, reparative, anti-frizz
Recommended Pairing	OUAI Medium Conditioner
Size	10 Oz

Our Verdict

OUAI Medium Shampoo is a strong choice for anyone with medium-thickness hair who wants an everyday, sulfate-free cleanser that improves hydration, reduces frizz and adds shine. While price and individual scalp responses vary, the combination of babassu, coconut oil and keratin makes it a worthwhile step in a low-fuss routine for smoother, healthier-looking hair.

Frequently Asked Questions

Is this shampoo suitable for color-treated hair?
The sulfate-free formulation is generally safer for color-treated hair than sulfated shampoos, but pairing with a color-safe conditioner is recommended.

Will it weigh down my hair?
For medium hair the shampoo is designed to be weightless, but users with very fine hair may notice some heaviness from the oil ingredients.

How often should I use it?
Most users can use it at every wash; frequency depends on personal scalp oiliness and styling routine.