Olaplex

N°.0.5 Scalp Longevity Hydrating and Anti-aging Scalp Serum Treatment

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$35.20 $44.00

What it is: A weightless scalp serum that targets visible scalp aging, strengthens the scalp barrier, and immediately hydrates to support softer, heal

SKU Code: P515214:2848281
Model: P515214:2848281
Source: Sephora
Brand: Olaplex
Categories: Hair&Bath&Body, Treatments, Scalp Treatments

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Olaplex

What it is: A weightless scalp serum that targets visible scalp aging, strengthens the scalp barrier, and immediately hydrates to support softer, healthy-looking hair.

Hair Texture: Straight, Wavy, Curly, and Coily

Hair Type: Fine, Medium, and Thick

Hair Concerns:

- Visible Signs of Aging

- Flaky, Dry Scalp

- Scalp Buildup

Key Benefits:
- Immediately hydrates and soothes the scalp

- Strengthens and protects the scalp barrier and microbiome

- Promotes soft, shiny, healthy-looking hair

Highlighted Ingredients:
- Olaplex Bond Building Technology: Relinks bonds to strengthen the scalp barrier.

- Antioxidant-Rich Blend: Protects against damage that causes accelerated scalp aging.

- Biome Barrier-Balancing Blend: Maintains a healthy scalp environment and optimal microbiome balance.

Ingredient Callouts: Free of parabens, phthalates, and sulfates SLS & SLES. It is also vegan and cruelty-free.

What Else You Need to Know: This first-of-its-kind, bond-building scalp serum strengthens the scalp barrier, balances the scalp microbiome, and targets visible scalp aging to set the foundation for a future of softer, healthy-looking hair. The serum is trichologist approved, dermatologist tested, and for all hair and scalp types.

Clinical Results: In a consumer-perception study of 75 participants, results showed:

- Visibly healthier and softer hair after 4 weeks

In a test, results showed:

- Scalp is 5X more hydrated immediately after use

- Clinically proven to repair and strengthen the scalp barrier and protect from accelerated scalp aging

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Images from reviews

3w ago

Recommended

Definitely a good purchase

Best serum . Good for dry scalp and itchy scalp. Go to the gym frequently so it’s really good for sweaty hair.

goodfordryscalp

3w ago

STINKS

Honestly I couldn’t tell you if this product works or not because after the first use I got rid of it! This is the nastiest smelling product on this earth! Think dirty socks and vomit beanboozled! What sucks is that you need to put it in clean hair… so after you wash, it stinks again! in

ls1231

Incentivized

4w ago

Nope!

Omg this smell. Smells like musty throw up ugh horrible… first day trying it I don’t even think can keep on using this too see any kind of results

MissVero

Verified Purchase

2mos ago

Recommended

Actually helpful.

I definitely see the difference in my scalp. It is more hydrated and doesn't get dry or flaky. It was worth the investment. It does have a bit of a smell to it but for what it does, I don't mind. I just use other product that smells good after.

KittyM21

Verified Purchase

2mos ago

Recommended

The smell will fade

I absolutely love this. It made my hair shiny instantly. The smell is different but just remember that fragrance isn’t good for the skin/scalp. Fragrance in general is bad for us.I use this on my scalp and then to the oribe resilience leave in and my hair is left smelling lovely. leave leave in

lizziee5

3mos ago

Awful scent

It's entirely possible that this works very well, but I can't leave it on my hair long enough to find out because of how bad it smells. Had to check other reviews to see if mine had gone bad or if it was supposed to smell this terrible.

isitdropsy

3mos ago

Recommended

Yep. Great product for dry scalp!

Love this product! It’s so soothing for a dry scalp! It has a fermented smell due to the probiotics in the formula, which I prefer over strongly perfumed! The smell is only noticeable when applying and quickly dissipates. Love this one!!

fluv

Verified Purchase

4mos ago

WORKS— BUT AT WHAT COST???

Take my word on this as someone who normally doesn’t mind conventionally “bad” smells…. this product smells awful. The scent is a bizarre mix of acrylic paint and a musty, almost geriatric odor, and the worst part is that it lingers for nearly 24 hours. It’s not a quick “apply and it fades” situation… it sticks around. You can try to mask it with nice-smelling oils, but since this product is only effective if you’re using it daily or every other day, the trade-off just isn’t worth it. You basically end up walking around with the faint smell of this stuff on a consistent basis. Even if you’re single, imagine this: someone you find attractive accidentally getting a whiff of your scalp with this in… Your hair is actually freshly washed, completely clean… but because you applied this serum, it smells like acrylic paint and nursing home air. Completely unacceptable in 2026. In my experience, I’ve gotten the same — if not better — results with minoxidil, so I won’t be repurchasing this. I’m going to try a peptide serum instead for hydration. I want to add that the bottle is tiny for the price, and considering the awful smell and the amount you get, it’s simply not worth it. This formulation honestly feels lazy. Simply unacceptable.

oceanxmoon

5mos ago

horrible smell

smells horrible!!!! worst smelling product like stale eggs and rotting fruit.

mmmmara

Verified Purchase

6mos ago

Not recommended if you have sensitive scalp

I wouldn’t buy this again. It gave me a very dry and itchy scalp. I was using it a couple of times so my skin got used to it, but it got worse :(. I had to stop using it all together and wasted my 40 dollars

KaryMP

What it is: A weightless scalp serum that targets visible scalp aging, strengthens the scalp barrier, and immediately hydrates to support softer, healthy-looking hair.

Hair Texture: Straight, Wavy, Curly, and Coily

Hair Type: Fine, Medium, and Thick

Hair Concerns:

- Visible Signs of Aging

- Flaky, Dry Scalp

- Scalp Buildup

Key Benefits:
- Immediately hydrates and soothes the scalp

- Strengthens and protects the scalp barrier and microbiome

- Promotes soft, shiny, healthy-looking hair

Highlighted Ingredients:
- Olaplex Bond Building Technology: Relinks bonds to strengthen the scalp barrier.

- Antioxidant-Rich Blend: Protects against damage that causes accelerated scalp aging.

- Biome Barrier-Balancing Blend: Maintains a healthy scalp environment and optimal microbiome balance.

Ingredient Callouts: Free of parabens, phthalates, and sulfates SLS & SLES. It is also vegan and cruelty-free.

Clinical Results: In a consumer-perception study of 75 participants, results showed:

- Visibly healthier and softer hair after 4 weeks

In a test, results showed:

- Scalp is 5X more hydrated immediately after use

- Clinically proven to repair and strengthen the scalp barrier and protect from accelerated scalp aging

-Olaplex Bond Building Technology: Relinks bonds to strengthen the scalp barrier.
-Antioxidant-Rich Blend: Protects against damage that causes accelerated scalp aging.
-Biome Barrier-Balancing Blend: Maintains a healthy scalp environment and optimal microbiome balance.

Aqua/Water/Eau, Glycerin, Propanediol, C9-12 Alkane, Octyldodecanol, Bis-Aminopropyl Diglycol Dimaleate, Phenoxyethanol, Sodium Acrylates Copolymer, Oryza Sativa (Rice) Bran Oil, Arginine, Chlorphenesin, Glycine Soja (Soybean) Seed Extract, Hydrogenated Polydecene, Lecithin, Coco-Caprylate/Caprate, Citric Acid, Menthoxypropanediol, 1,2-Hexanediol, Ceramide NP, Cetearyl Alcohol, Glyceryl Stearate, Tasmannia Lanceolata Leaf Extract, Phenethyl Alcohol, Pogostemon Cablin Leaf/Stem Extract, Lavandula Angustifolia (Lavender) Flower/Leaf/Stem Extract, Lavandula Oil/Extract, Pentylene Glycol, Leptospermum Scoparium Branch/Leaf Oil, Ceramide AP, Cholesterol, Hydrogenated Lecithin, Phytosphingosine, Stearic Acid, Magnolia Officinalis Bark Extract, Piper Nigrum (Pepper) Seed Extract, Tetraacetylphytosphingosine, Sodium Acetylated Hyaluronate, Sodium Hyaluronate, Sodium Hyaluronate Crosspolymer, Xanthan Gum, Hydrolyzed Sodium Hyaluronate, Ceramide EOP, Sodium Benzoate, Ethylhexylglycerin, Glycosphingolipids.

Suggested Usage:
-Part hair with the needle-nose applicator.
-Squeeze gently and apply directly to scalp.
-Continue for as many sections as needed. Olaplex pros suggest three to four sections on the crown and back of head.
-Massage thoroughly into scalp to ensure proper absorption.
-Use before styling wet hair or as an overnight formula when hair is dry.
-For best results, use three times a week.
-The serum is gentle enough for daily use.