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OUAI Scalp Serum 60ml frosted glass bottle with white pump cap.
20% off
OUAI Scalp Serum bottle held by hand with serum dripping down
Before and after comparison showing fuller, thicker dark hair at the hairline.
A close-up before-and-after comparison of dark brown hair on a person's scalp, with the left side labeled BEFORE and the right side labeled AFTER.
OUAI Scalp Serum 60ml bottle surrounded by mint leaves with benefit callouts.
Woman applying OUAI Scalp Serum dropper to hair part, holding bottle.
OUAI Scalp Serum 60ml featuring key ingredients Arctic Root, Peptides, and Red Clover Extract.
OUAI Scalp Serum dropper bottle held by two hands, white background.
OUAI Scalp Serum 60ml frosted glass bottle with white pump cap.
20% off
OUAI Scalp Serum bottle held by hand with serum dripping down
Before and after comparison showing fuller, thicker dark hair at the hairline.
A close-up before-and-after comparison of dark brown hair on a person's scalp, with the left side labeled BEFORE and the right side labeled AFTER.
OUAI Scalp Serum 60ml bottle surrounded by mint leaves with benefit callouts.
Woman applying OUAI Scalp Serum dropper to hair part, holding bottle.
OUAI Scalp Serum 60ml featuring key ingredients Arctic Root, Peptides, and Red Clover Extract.
OUAI Scalp Serum dropper bottle held by two hands, white background.

Scalp Serum

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.
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Helps support the appearance of thicker, healthier hair. Featuring Adaptogens like Arctic Root, Siberian Ginseng, and Chaga Mushroom combined with Hyaluronic Acid, this serum can help promote hydration and a healthy barrier. Good for all hair types.

Good to Know
Worried about hair looking oily? We got you. Scalp Serum easily absorbs into the scalp & works for all hair types and textures, including oily hair types.



How to use

Apply daily for best results. This is a leave-in product.  Do not rinse out.
Must be applied directly to the scalp.
Can be applied in the am or pm on wet or dry hair.
Do not apply to open wounds and/or broken skin on the scalp.
Start application in your natural part and along your hairline
Press and release the bulb once to fill the glass pipette. Unscrew the cap.
Use short, quick presses to release drops throughout the scalp.
Massage in to help distribute and absorb into the scalp.

SCALP SERUM is skin care inspired. The key is consistent use to see results and absorption. Face serums typically can take anywhere from a 1 minute to a few minutes to absorb and completely dry. Same goes for

SCALP SERUM – wait until the serum has completely dried and absorbed before washing hair.
If applying at night you are safe to wash your hair and scalp in the morning. If you apply in the morning you will be safe to wash your hair and scalp in the afternoon or evening

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.

As always, all of our products are:
Paraben-Free, Cruelty-Free, Gluten-Free, Phthalate-Free, SLS and SLES-Free

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Scalp Serum

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THE SCENT:
CAPE TOWN

TOP NOTES

Ginger, Basil, Spearmint

MIDDLE NOTES

Tomato Leaves, Green Fig

BASE NOTES

Ambroxan, Wet Grass

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Overall rating: 4.614319 / 5 from 433 reviews.

AI Generated Review Summary

This scalp serum is praised for its effectiveness in balancing and hydrating the scalp, leading to noticeable improvements in hair health and appearance. Customers appreciate the refreshing feel and pleasant smell, though opinions vary on hair growth and density changes.

Summary topics

  • Effectiveness (8%): Customers loved the results, with many expressing their happiness and satisfaction with the product's effectiveness.
  • Scalp Feel (15%): Many customers expressed satisfaction with how their scalp feels after using the product, describing it as refreshing, clean, and nourished.
  • Hair Health (34%): Many customers raved about how this product made their hair thicker, stronger, and softer than ever.
  • Scent (36%): A significant amount of customers expressed appreciation for the pleasant and amazing smell, describing it as great, amazing, and delicious.
  • Hair Appearance (4%): It was reported by customers that the product makes their hair look healthier, fuller, and shinier.

Review topics: ["volume","fragrance","absorbs","problem","weight","improvement","skin","smells","results","feels","packaging","price","look","hair","scalp","works","bottle","oil","amount","difference","residue","light","consistency","serum","body","growth","change","buy","use","application"].

Review highlights

  • "The serum smells wonderful and my scalp feels cool and comfortable in between washes." — Natasha
  • "I’ve been using it for 2-3 weeks and my scalp feels healthier, and my hair looks healthier and feels softer." — Sara S.
  • "After the first use I noticed such a huge difference WAY less flake, my scalp felt amazing, and it smells sooo good." — Mari G.

Reviews

Helped my thinning hair areas

"This serum has noticeably improved my hair growth in thinning areas on the side and top of my scalp. I’m 58 and use it every night on these three areas and even my Aveda stylist has noticed an improvement since March!"

— Lynn J. (5/5)

wonderful and makes hair look

"wonderful and makes hair look full"

— Susan D. (5/5)

Wow!!

"Smells amazing, effective"

— Meredes P. (5/5)

LOVE THE SMELL

"Please make a perfume or body mist or hand soap or anything in this scent!! I’d buy immediately!"

— Cb (3/5)

"I love the smell i wish yall had a body spray"

— maria (5/5)

Scalp

"Doesn’t help scalp. Don’t waste your money."

— Susan L. (1/5)

"Amazing product USING IT FOR YEARS INCREDIBLE"

— Jerry (5/5)

"Love this stuff."

— Claudette (5/5)

"Incredible scalp serum! Very light weight and non-oily. Does not weigh my fine hair down. Genuinely fixed my scalp psorasis! I will buy this product forever."

— Ashley (5/5)

Scalp feels great and I don’t shed as much

"This serum feels wonderful on the scalp, is easy to work through and smells great. It does seem to help invigorate the scalp and lead to less shedding for me post-partum. I really like the product!"

— Mahashraya S. (5/5)

Q&A

Be honest - can I overdo it with this serum? It feels so good on my scalp and smells so good that I often find myself putting 3 droppers full all over my scalp each night!
Hi Kate, 😊 Our recommendation is to apply it directly to the scalp using short, quick presses throughout your part line and scalp, then massage it in for absorption. Consistent daily use is key to seeing the best results. That said, more isn’t necessarily better. If you’re using 3 full droppers and your scalp feels comfortable (not greasy, irritated, or experiencing buildup), there’s no need to panic. However, you likely don’t need quite that much product to get the benefits. Try focusing on even distribution across the scalp rather than saturating it—the serum is formulated to absorb easily and create a healthy, hydrated environment for hair to thrive. And we totally get it—the Cape Town scent makes it hard to resist! 💛
Can this be used on a scalp that has hair loss from chemo?
Hi Susu, This is a great question! We recommend consulting with your doctor if you have any concerns about starting new products as they know your particular needs best! In the meantime, all OUAI products are free of sulfates, parabens, and phthalates. Additionally, we post the full ingredient list of each product on the description pages. I hope this helps!
On average, how many days does the bottle last if I use it every day?
Hi Oscar, Typical period for one unit of scalp serum (60 mL) really depends on how much consumer will use each time. The dosage for two full droppers is about 1.5 mL, if used once a day daily, the bottle should last up to 40 days. Hope this helps! Have a OUAI wonderful day!
Is the scalp serum safe for pregnant and/or nursing mothers?
Thank you for reaching out to our OUAI team and congratulations on your growing family! We choose every ingredient carefully to provide the right balance of features and benefits. All of our ingredients are approved for use in both EU and US markets. All OUAI products are also free of sulfates, parabens, and phthalates. Additionally, we post the full ingredient list of each product on the description pages. We recommend consulting with your doctor if you have any concerns about starting new products while pregnant as they know your particular needs best!
I love the scalp serum and the scent. Do you plan on making a perfume out of Cape Town?
At the moment, we only have two products in our Cape Town scent available. However, we will absolutely pass on your feedback in wanting to see a Cape Town Eau du Parfum to the team. The feedback of customers is crucial for knowing what our community wants!