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OUAI

Hydrating Scalp Serum for Healthy, Fuller Looking Hair

4.2 · 1051 reviews
5,735 ₽

What it is: Healthy hair starts with the scalp. This skincare-inspired serum helps balance and hydrate your scalp to create an ideal environment for hair to thrive.Hair Type: Straight, Wavy, Curly, and CoilyHair Texture: Fine, Medium, and ThickHair Concerns:- Damage, Split Ends, and Breakage- Thinning- Flaky, Dry ScalpKey Benefits: - Fosters a healthy, balanced scalp- Soothes irritation from styling- Promotes the appearance of thicker, fuller hairHighlighted Ingredients:- Adaptogens and Hyaluronic Acid: Promote hydration and a healthy barrier.- Red Clover Flower Extract: Reduces scalp discomfort from styling.- Peptides: Support the appearance of fuller, thicker, and healthier hair.Ingredient Callouts: Free of parabens, formaldehydes, formaldehyde-releasing agents, phthalates, mineral oil, retinyl palmitate, oxybenzone, coal tar, hydroquinone, sulfates SLS & SLES, triclocarban, triclosan, and contains less than one percent synthetic fragrance. It is also vegan, gluten-free, cruelty-free, and comes in recyclable packaging.What Else You Need to Know: This serum supports the appearance of thicker, healthier hair. Featuring adaptogens like Arctic root, Siberian ginseng, and chaga mushroom combined with hyaluronic acid, this serum promotes hydration and a healthy barrier. It's good for all hair types.Research Results: Based on a 16-week expert grading study performed on 32 subjects- 100% of users showed improvement in the look of fuller, thicker hair- Clinically proven to help improve the overall health of the scalp and  the look of fuller, thicker hair- 90% of users showed improvement in health of their scalpBased on a 12 week consumer study of 115 participants:- 91% of users reported that their hair feels healthier- 87% of users reported a visible improvement in the appearance of their hairFragrance Description: Scented with Cape Town, a calming and earthy fragrance of spearmint, ginger, basil, and green fig.

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What it is: Healthy hair starts with the scalp. This skincare-inspired serum helps balance and hydrate your scalp to create an ideal environment for hair to thrive.Hair Type: Straight, Wavy, Curly, and CoilyHair Texture: Fine, Medium, and ThickHair Concerns:- Damage, Split Ends, and Breakage- Thinning- Flaky, Dry ScalpKey Benefits: - Fosters a healthy, balanced scalp- Soothes irritation from styling- Promotes the appearance of thicker, fuller hairHighlighted Ingredients:- Adaptogens and Hyaluronic Acid: Promote hydration and a healthy barrier.- Red Clover Flower Extract: Reduces scalp discomfort from styling.- Peptides: Support the appearance of fuller, thicker, and healthier hair.Ingredient Callouts: Free of parabens, formaldehydes, formaldehyde-releasing agents, phthalates, mineral oil, retinyl palmitate, oxybenzone, coal tar, hydroquinone, sulfates SLS & SLES, triclocarban, triclosan, and contains less than one percent synthetic fragrance. It is also vegan, gluten-free, cruelty-free, and comes in recyclable packaging.What Else You Need to Know: This serum supports the appearance of thicker, healthier hair. Featuring adaptogens like Arctic root, Siberian ginseng, and chaga mushroom combined with hyaluronic acid, this serum promotes hydration and a healthy barrier. It's good for all hair types.Research Results: Based on a 16-week expert grading study performed on 32 subjects- 100% of users showed improvement in the look of fuller, thicker hair- Clinically proven to help improve the overall health of the scalp and  the look of fuller, thicker hair- 90% of users showed improvement in health of their scalpBased on a 12 week consumer study of 115 participants:- 91% of users reported that their hair feels healthier- 87% of users reported a visible improvement in the appearance of their hairFragrance Description: Scented with Cape Town, a calming and earthy fragrance of spearmint, ginger, basil, and green fig.

Customer reviews

1.0
verified purchase
Don’t bother

Get the ordinary peptide density serum and Pantene abundant & strong instead. Because what the actual f is this dropper. Terrible design. And frankly I’m seeing more shedding in the shower when i use this at night.

6/19/2026
1.0
verified purchase

I was soooo consistent with this product because it was so expensive. Used this every day for a full year religiously and was very hopeful. No results :/

6/5/2026
4.0
verified purchase
Amazing and Works

This really works, my hairdresser can verify! I lost hair from breast cancer a few yrs ago. I never grew and started using this, it’s a miracle in a bottle!

3/20/2026
5.0
verified purchase
This has gave me the best hair growth results

I went and had my hair done today with a high end beauty salon, and this is the product I have been using for hair loss, and new hair growth. And my stylist told me I have so much new hair growth so whatever I’m doing keep it up

3/17/2026
5.0
verified purchase

YES, YOUR HAIR WILL GROW. Investment that works. No smell or residue :)

3/7/2026
4.0
verified purchase
Nice

I don't know if this helped much with hair growth but it is very soothing on my scalp and i love the way it smells. I would rebuy this for scalp hydration/soothing when feeling dry or itchy after a deep clean shampooing

3/7/2026
5.0
verified purchase
Magical product!

I bought a holiday kit for the Detox Shampoo and this came as a bonus. It sat in the cupboard for a month because I didn't really know what it was and was concerned it would mess up my blow dry (you use it on dry hair) and/or make it greasy. You put a few drops on your scalp at night and rub it in, it goes on very thin but immediately penetrates into your scalp so no wetness or residual oil. Since using it (about 6 weeks) I have noticed a huge improvement in the health and condition of my hair. I have been working on healing my dry damaged bleached hair for a year and half and it is improving but this gave me instant results of a huge improvement on the texture and health of my hair. My hair is always so silky and soft now. I don't know if it helps speed up growth because my hair has always grown fast. I wish I had bought more of the holiday kits because it was a such a good deal but i would even buy this on it's own at full price, it is that good!

2/21/2026
5.0
verified purchase

I know this serum doesn’t actually have any hair growth ingredients, but I have seen a crazy increase in hair density and growth since starting to use this product consistently three years ago. The hydration this serum gives the scalp must be doing something right! I have tried basically every scalp serum on the market and even the ones people say are not greasy have always left my hair looking like I haven’t showered in a few days. This one is different, when I massage it in it dries perfectly dry and isn’t greasy. It has a pleasing smell that isn’t overbearing. I totally recommend this serum.

2/19/2026
4.0
verified purchase
Smells amazing, okay results

Smells amazing! I think this did really hydrate my scalp well, but I didn’t see a difference in hair growth that I wanted. I want a perfume of this scent so badly!

2/13/2026
5.0
verified purchase
Saved my dry winter scalp

Calgary has very dry winters and my scalp was feeling itchy, tight, and flaky. This serum really helped soothe my scalp and restore moisture. After consistent use, my scalp feels calmer, more comfortable, and much healthier. Lightweight and doesn’t weigh my hair down.

1/31/2026