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Act+Acre

4% Niacinamide Scalp Serum For Oily Scalp + Hair

4.7 · 149 reviews
7,222 ₽

What it is: A pH-optimized leave-on scalp serum designed to extend time between washes and control excess oil and odor.Hair Texture: Straight, Wavy, Curly, and CoilyHair Type: Fine, Medium, and ThickHair Concerns:- Color Safe- Oily ScalpKey Benefits: - Balances scalp pH to prevent excess oil production- Extends time between washes- Stabilizes the scalp to be less oily over timeHighlighted Ingredients:- 4% Niacinamide: A topical vitamin B3 that balances oil levels.- 5% Hyper-Fermented Green Tea Blend: Molecular antioxidant targets excess oil.- 2% Bio-Fermented Astragalus: Supports collagen and hyaluronic acid production for moisturized skin.Ingredient Callouts: This product is vegan, gluten-free, cruelty-free, and comes in recyclable packaging.What Else You Need to Know: Niacinamide is a water-soluble form of vitamin B3. Niacinamide is an antioxidant and anti-inflammatory ingredient to support regulated oil production.Act+Acre uses bio- and hyper-fermented ingredients in this formula to create a multitude of smaller molecules that can better penetrate the scalp for boosted efficacy and pH optimization of the scalp microbiome.Fragrance Description: Fragrance-free.Clean at Sephora is our commitment to offering effective products without certain ingredients, such as parabens, sulfates, phthalates, and mineral oils. Learn more here.

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What it is: A pH-optimized leave-on scalp serum designed to extend time between washes and control excess oil and odor.Hair Texture: Straight, Wavy, Curly, and CoilyHair Type: Fine, Medium, and ThickHair Concerns:- Color Safe- Oily ScalpKey Benefits: - Balances scalp pH to prevent excess oil production- Extends time between washes- Stabilizes the scalp to be less oily over timeHighlighted Ingredients:- 4% Niacinamide: A topical vitamin B3 that balances oil levels.- 5% Hyper-Fermented Green Tea Blend: Molecular antioxidant targets excess oil.- 2% Bio-Fermented Astragalus: Supports collagen and hyaluronic acid production for moisturized skin.Ingredient Callouts: This product is vegan, gluten-free, cruelty-free, and comes in recyclable packaging.What Else You Need to Know: Niacinamide is a water-soluble form of vitamin B3. Niacinamide is an antioxidant and anti-inflammatory ingredient to support regulated oil production.Act+Acre uses bio- and hyper-fermented ingredients in this formula to create a multitude of smaller molecules that can better penetrate the scalp for boosted efficacy and pH optimization of the scalp microbiome.Fragrance Description: Fragrance-free.Clean at Sephora is our commitment to offering effective products without certain ingredients, such as parabens, sulfates, phthalates, and mineral oils. Learn more here.

Customer reviews

1.0
verified purchase
Terrible! Do not buy!

Terrible! Does the exact opposite of what is advertised! I followed the directions, putting 2 pipettes throughout my CLEAN scalp (mid-length hair) on freshly washed damp hair prior to blow drying. I have oily hair; it usually stays looking clean/freshly washed for 18 hours or so. The photo is 2 hours after using the product on my clean hair. My freshly washed clean hair now looks like it does (or worse) on day 3. This is the worst product I’ve ever used on my hair. Do not buy!!!!

6/25/2026
5.0
verified purchase
Skincare

It’s powered by niacinamide, so it feels more like skincare for your scalp than a typical hair product. I also like that it absorbs fast and doesn’t leave any residue, so I can use it on non-wash days without worrying about buildup.

4/12/2026
1.0
verified purchase
More oily hair

Returned this product because it made my hair soooo greasy! I have oily hair but this made it so much worse and heavier. I wanted to like it but did not work. Tried it on my mom as well, even greasier hair.

10/12/2025
5.0
verified purchase
Oily Bangs Where

I have naturally oily hair and usually have to wash it every single day, especially because my bangs get greasy so quickly. I’ve tried similar scalp serums in the past, but this one really stood out to me. I’ve been using the Act+Acre Niacinamide Scalp Serum consistently for a few weeks now, and I can honestly say my hair feels and looks noticeably less oily overall. One of the biggest differences is that my hair doesn’t look greasy AS FAST - my roots and bangs stay fresher longer, which has actually helped me stretch the time between washes. Before, I couldn’t skip a wash day without feeling like my hair looked limp and oily, but now I can comfortably go longer without worrying about it. It’s super lightweight, doesn’t add any heaviness, and absorbs quickly without leaving any residue behind. My scalp feels balanced and healthier too, not dry or irritated at all. Product was gifted by actacre.

7/15/2025
5.0
verified purchase
My experience after 2 weeks of use

My experience after 2 weeks of use My hair type is oily on top, dry around the edges. I applied the serum every other day at night to a clean, dry scalp, massaging in circular motions to promote absorption. After 3-5 days: I started to notice that my hair stayed clean longer. Before, I washed it daily; now I could go a day without it looking greasy. My scalp felt less irritated, and I didn't notice any itching, even after being in the sun. It didn't cause dandruff or breakouts. It also doesn't have a scented effect or a cooling sensation like other menthol products, but that didn't bother me. So far, I've liked the product. gifted by actacre

7/1/2025
5.0
verified purchase
It really does work

I’ve been using the Act+Acre 4% Niacinamide Oily Scalp Serum and it’s made such a difference in how my scalp feels. Less oily between washes, way more balanced, and my hair just looks fresher longer. It’s lightweight, doesn’t weigh my hair down, and actually feels like skincare for your scalp.

4/24/2026
4.0
verified purchase
I love it

I love using this! I have oily scalp and it comes pretty quickly after showering. This has helped delay how quickly my scalp gets oily. It’s so easy to use and doesn’t weigh down hair. It’s great for all hair types.

4/13/2026
5.0
verified purchase

I have been using this serum for a couple days and I am already noticing a difference. I have fine hair that gets oily quickly, and this serum is slowing the time between washes. It’s refreshing to use a product that does not irritate my scalp or weight down my hair.

4/12/2026
5.0
verified purchase

I was one of those who needs to wash her hair every other day and it smelled oily but this product was a game changer Go for it but definitely read the instructions before using it

3/16/2026
5.0
verified purchase
so far so good

I have been using this serum for a weeks now and I have noticed a slight improvement. I like the packaging. The dropper dispenses the perfect amount of product. It doesn't have an overpowering scent and it doesn't feel greasy. I have noticed a slight improvement in oil production in my second day hair. I will continue to use for better results. Gifted by act + acre

7/8/2025