Overall rating: 4.611628 / 5 from 430 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%
• Scalp Feel: 15%
• Hair Health: 34%
• Scent: 36%
• Hair Appearance: 4%

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

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!