Description
HOIA Hair Growth Serum
Balance. Nourish. Restore.
This carefully crafted hair serum blends botanical and essential oils to support scalp health, encourage natural hair growth, and restore shine and vitality. Lightweight yet deeply nourishing, it replenishes hair with essential fatty acids while softening, smoothing, and strengthening from root to end.
Designed as a scalp-focused ritual, the serum helps relieve dryness, irritation, and itching, creating a balanced environment where healthy hair can thrive. At the heart of the formula is black cumin oil — a powerful botanical known for supporting hair growth, helping reduce hair loss and premature greying, and protecting both scalp and hair with antioxidant care.
Awarded the Beauty Favorite Award (2019), this bestselling serum has become a trusted favourite for those seeking stronger, healthier-looking hair.
How to Use
Apply the serum to the scalp and hair roots, then gently massage for 5 minutes. Leave it on for 20 minutes before washing it out with shampoo. If needed, follow with conditioner.
For hair growth restoration, use 2-3 times a week. This versatile serum can also be applied to hair ends as a mask or added to a hair balm for extra nourishment.
K. –
Really good for calming a dry scalp. Washes out easily and doesn’t make roots greasy. Maybe I’m imagining it, but I feel like I even have fewer grey hairs 😀 — and it definitely adds shine.
Dea –
I’ve been using this for years and my hair really benefits from it. It makes hair soft and easy to brush, helps with hair loss, and supports new growth.
Eve –
Definitely recommend if you struggle with a dry, flaky scalp. It cooled and moisturised right away, and most of the dandruff-like flakes disappeared after the first use.
Kristi –
Honestly the best HOIA product 🙂 100% recommend!
Tuuli –
A serum that really does what it promises. After a couple of uses, I noticed that more new hair has started to grow, and my natural regrown hair looks shinier than before. I’ve applied the serum both to my scalp and hair ends before washing, and after washing I use a smaller amount on the ends. Highly recommend!
Kätlin –
Such a great product. I struggle with a dry, itchy scalp and after one bottle things already feel much better. My hair is softer, shinier, and no longer dull. Love the scent too. Will keep using and highly recommend!
Kristina –
Such an amazing serum. I bought it because of the reviews and I’m beyond satisfied. My naturally curly, usually dry ends were soft and hydrated after the first use. This serum is definitely staying in my routine. And the scent is incredible!
Liisa –
This serum has made a huge difference for my dry scalp. I usually deal with bad dryness, itching, and major hair loss every winter, but since using HOIA’s serum, the problem has nearly vanished.
Lea –
Leaves bleached hair soft and silky. I haven’t achieved this kind of result even after a salon visit. Very satisfied and highly recommend. Washes out easily.
Henrika –
This serum made my hair grow like crazy – almost 15 cm in half a year!
It moisturizes the scalp really nicely, and after washing it out, my hair feels so fluffy and shiny! 🤩
Katarina –
I only bought it recently and I’m already very satisfied. It moisturizes the scalp and makes it feel so fresh. My dandruff is gone. It smells really good. When I wash my hair now, far fewer strands fall out—before, there used to be much more. I hope it will also have a positive effect on hair growth!
Kristina –
My go-to hair hero.
I use it as a pre-wash treatment to soothe my scalp and support hair growth, and after washing, just a few drops on damp ends to leave my curls looking absolutely beautiful.
As a bonus, I even mix it into my at-home hair color for extra nourishment 😉
Highly recommend!
Diana –
I bleached my hair on impulse and ended up with a dry, lifeless mess.
HOIA serum worked wonders—almost instantly ❤️
I use it 2–3 times a week, applying a small amount (about 5 pumps) to my scalp and through the lengths. The result? Absolutely amazing hair—soft, shiny, and healthy ❤️
Janza –
An amazing product!
I’ve struggled with hair thinning for the past 2 years and tried so many different solutions to regrow my hair—but nothing worked.
I’ve now been using this product for 3 months, and the results are visible!
New baby hairs are growing, and my hair feels soft, smooth, and easy to brush. Absolutely love it!
Anneli –
I’ve tried many different serums for my fine, thinning hair. Most of them leave my hair tangled, and oil-based serums often make it greasy and heavy.
But HOIA serum is different—it washes out easily, leaving my hair soft, light, and shiny. I’ve even noticed faster growth of new baby hairs.
It’s especially perfect for giving sun-damaged summer hair a much-needed boost!
Thea –
I’ve been using this for about a year, and my hair loss has completely stopped.
My hair looks healthy and strong again.
I highly recommend it—even for those aged 65+.
Diana –
I’ve used this product twice so far. The first time, I applied it to the full length of my hair after washing. The result was slightly greasy, and I didn’t notice much softness or shine—I was honestly a bit disappointed.
Today, I followed the instructions properly. I applied the serum to my scalp, then used what was left on my hands to lightly run through the lengths—about 5 pumps in total, which didn’t feel like much. I left it on for 2–3 hours before washing it out with a natural solid shampoo, followed by HOIA conditioner.
Even while my hair was still damp, I could feel the difference—it was noticeably softer. But the real surprise came once it dried. I haven’t had hair this shiny, soft, healthy, and vibrant in a long time. Even my natural hair color looked completely different—it was glowing ❤️
I’m extremely happy with this product. It outperforms every mask and hair oil I’ve tried. Truly the best haircare product I’ve ever used ❤️
Liisa –
This serum has done wonders for my dry scalp!
Every winter, I used to struggle with a dry, itchy scalp and heavy hair loss. But ever since I started using Hoia serum, that problem has almost completely disappeared.
I use it about once a week—apply it 1–2 hours before washing, tie my hair up, and then wash as usual. My hair feels incredibly soft, and my scalp stays hydrated without becoming greasy.