In Stock
Nécessaire

Rosemary Serum with 70% Rosemary Blend and 5% Capixyl for Thinning Hair

4.8 · 202 reviews
5,098 ₽

What it is: An advanced leave-in scalp serum with five percent Capixyl and 70 percent rosemary to support denser-, fuller-, healthier-looking hair.Hair Texture: Straight, Wavy, Curly, and CoilyHair Type: Fine, Medium, and ThickHair Concerns:- Thinning- Anti-agingHighlighted Ingredients:- Capixyl™ 5%: Supports denser-, fuller-, healthier-looking hair.- Rosemary 70% (Water, Oil, and Extract): Delivers nutrients to the scalp.- Clear Liquid Base: Dries quickly and leaves no residue.Ingredient Callouts: This product is cruelty-free.What Else You Need to Know: Designed for daily use, this scalp serum combines Capixyl, a micro-dose of plant proteins, essential ceramides, and rosemary water, oil, and extract to support denser-, fuller-, healthier-looking hair. It’s clear, quick-drying, and leaves no residue behind. It’s also dermatologist tested, hypoallergenic, noncomedogenic, and color-safe.Fragrance Description: Formulated without synthetic fragrance, this serum smells like pure rosemary. Please note that it has a different fragrance than the Rosemary Shampoo and Conditioner for Thinning Hair (each sold separately).Clean + Planet Aware at SephoraProducts formulated without certain ingredients, including parabens, sulfates, phthalates, and mineral oils, from brands that have met our specific criteria for ingredient sourcing and formulation, packaging, environmental commitments, and consumer transparency. Learn more here.

International delivery

Shipping calculated at checkout

Returns & exchanges

Within 30 days of delivery

What it is: An advanced leave-in scalp serum with five percent Capixyl and 70 percent rosemary to support denser-, fuller-, healthier-looking hair.Hair Texture: Straight, Wavy, Curly, and CoilyHair Type: Fine, Medium, and ThickHair Concerns:- Thinning- Anti-agingHighlighted Ingredients:- Capixyl™ 5%: Supports denser-, fuller-, healthier-looking hair.- Rosemary 70% (Water, Oil, and Extract): Delivers nutrients to the scalp.- Clear Liquid Base: Dries quickly and leaves no residue.Ingredient Callouts: This product is cruelty-free.What Else You Need to Know: Designed for daily use, this scalp serum combines Capixyl, a micro-dose of plant proteins, essential ceramides, and rosemary water, oil, and extract to support denser-, fuller-, healthier-looking hair. It’s clear, quick-drying, and leaves no residue behind. It’s also dermatologist tested, hypoallergenic, noncomedogenic, and color-safe.Fragrance Description: Formulated without synthetic fragrance, this serum smells like pure rosemary. Please note that it has a different fragrance than the Rosemary Shampoo and Conditioner for Thinning Hair (each sold separately).Clean + Planet Aware at SephoraProducts formulated without certain ingredients, including parabens, sulfates, phthalates, and mineral oils, from brands that have met our specific criteria for ingredient sourcing and formulation, packaging, environmental commitments, and consumer transparency. Learn more here.

Customer reviews

3.0
verified purchase
Give it time with consistent use.

Any product used for the scalp for shedding, growth etc. should be used consistently for six months before you see any results. I see people on here commenting it doesn’t work only after using for 1 month.

8/9/2026
5.0
verified purchase

Necessarie serum is really good. We see more hair growth and hair is also fuller.

8/3/2026
5.0
verified purchase
100% works absolutely convinced

I’ve been going through a very stressful time and YET this serum made my hair thicker before I finished the bottle. I’ve had thinning hair since Covid and now thanks to the serum I no longer feel insecure about it.

7/12/2026
1.0
verified purchase
Rosemary gimmick. Doesn’t work.

I’ve only noticed a difference with the original. I tried this version to see if there was any difference and saw nothing. I’ve used the original 3x even before the size change (2fl oz to 1oz) and it was the only that worked. I do plan on finding another brand due to the size change. However if yoh don’t care about that use the original.

6/17/2026
5.0
verified purchase
Less shedding - healthier hair

So I have lost alot of my hair due to being on a GLP1. I alternate using this with the Kerastase Genesis drops. First time using it I noticed less shedding in the shower. My hair has gotten thicker and bouncier. Again, these products have to be used consistently. I also have seborrehic dermatologist. On my crown of my scalp and this doesn't irritate my scalp.

5/17/2026
5.0
verified purchase
Sensitive scalp approved.

This is is my second time repurchasing. I have fine wavy hair and a very sensitive scalp. I love that it just smells of rosemary and doesn’t have added fragrance. I love Necessaire hair products.

5/2/2026
4.0
verified purchase
Will buy again and again.

Love this lightweight serum, it was one of the only serums that did not cause increased shedding when first using, it has supported new hair growth and retention with NO SIDE-EFFECTS. Be advised it does not cure hair loss, but promotes a healthy scalp for growth support.

2/4/2026
5.0
verified purchase
no more itchy scalp

i rarely write reviews. im using this for scalp irritation and dryness, not the hair thickening. it is great .. can apply often , dries down, no oily residue and calms my itching, dry scalp. ive been on a glp1 and had some significant hair breakage /thinning on my sides So will see if thats a secondary benefit. (medically , the glp1 effect does tend to be self limited so TBD if my hair will thicken where it broke/thinned. )

12/7/2025
5.0
verified purchase

This doesn’t leave my hair oily and I have noticed my hair getting thicker! I will be purchasing again

9/29/2025
2.0
verified purchase
Didn’t work for me

Usually love this brand so I thought I’d try this but the scent can be overwhelming at times and I used this consistently and I noticed more hair loss than usual so I will be going back to the color wow one. The dropper also doesn’t get a lot of product

9/15/2025