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Summary
OLAPLEX N°.0.5 Scalp Longevity Serum Treatment is a weightless scalp serum that targets visible scalp aging, strengthens the scalp barrier, and immediately hydrates to support softer, healthy-looking hair.
Benefits
- Immediately hydrates and soothes scalp
- Strengthens and protects scalp barrier and microbiome
- Promotes soft, shiny and visibly healthy hair
- Hydrating and Anti-aging
Key Ingredients
- Proprietary Scalp Barrier-Building Complex Patented OLAPLEX Bond Building Technology™ re-links disulfide bonds within keratin to strengthen the Stratum Corneum–the scalp barrier. Plus, a blend of essential fatty acids and ceramides provides nourishing lipid replenishment to hydrate a dry scalp.
- Antioxidant-Rich Blend Of Lavender Extract & Tazman Pepper extract Helps protect against damaging free radicals and accelerated scalp aging caused by stressors like sun, poor water quality, irritants, chemical treatments, hair products, stress, lack of sleep, and an imbalanced diet.
- Biome Pro-Balancing Blend Balances the microbiome and reinforces the scalp barrier to maintain a healthy scalp environment, which helps protect hair health.
Research Results
- Visibly healthy, softer hair after 4 weeks*
- 5X more hydrated scalp immediately**
- 51% improved scalp barrier in 14 days**
- 80% said scalp felt nourished after just one use*
- *Based on a consumer perception study of 75 participants after 28 days of use.
- **Based on a 16-week dermatologist-supervised clinical test of 25 participants following usage described on label
Item 2641617
- Part hair with needlenose applicator. Squeeze gently and apply directly to scalp.
- Continue for as many sections as needed. OLAPLEX Pros suggest 3-4 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 treatment when hair is dry. For best results, use three times a week. Gentle enough for daily use.
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.
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Reviews
Write A REVIEWReview Snapshot
by PowerReviews
Ratings Distribution
Hair Type
Most Helpful Positive Review
89/100
Before I tried this product, I viewed Olaplex as a brand for people who were born with good hair and just went to the salon to drop a few c-notes to get a touch up. I'm not one of those people. With hair, I am very low maintenance, preferring to wet it and forget it (antithetical to Olaplex in my ...
Most Helpful Critical Review
Not for me
I really wanted this scalp treatment to be a win, especially since I usually love Olaplex' products. Their shampoo and conditioner have been staples in my routine for a while, so I had high expectations going into this. Unfortunately, it didn't quite deliver on what I needed it for. To start with th...
172 results
Healthy hair starts at the scalp!
Hair Type Straight Hair
I'm Dani a licensed cosmetologist of many years! Healthy hair means everything to me as this is something I work with daily and truly do enjoy every second of it. When it comes to having healthy hair, it all starts from the scalp! This Olaplex Scalp Longevity Treatment sounded great and super easy to use. I have tried multiple scalp treatments and almost all have made me greasy. I would always have to shampoo my hair after the treatment. Well Olaplex Scalp Longevity Treatment does not! I have used it on clean hair and styled it without any oily or greasy areas. I applied it on dirty hair as well just to see. I did not see noticeable difference but my brain would think a cleaner scalp would be better than a dirtier one to help with absorption and even distribution. There was really no scent or if there was some it was a fresh light scent in my opinion but everyone's different. I love how easy the application process is. Literally no mess and takes a couple minutes if that. I have noticed my hair being extra shiny (not greasy) after using for a month and all around softer. I have bleached out hair and softness was never a word I would have used to describe my hair. Not any more! I received this product as a promotion for an honest professional review.

Perfect!!
Product was received as part of an educational promotion. After using No.0.5 Scalp Longetivity Treatment is an absolutely 10/10, it's a game changer product that you can tell the difference from the very first application, after showering. I was very impressed with Olaplex because it's super lightweight deeply nourishing, absorbs in just seconds and it's doesn't have that greasy residue, my hair feels softer, shinier and much easier to play it with it.The applicator it's super nice and goes all throughout the scalp. I love the nice and fresh smell that it has, that makes me feel like I'm at the spa. It didn't irritate my scalp. This product really helped me with my dry hair and lack of shine, that for that reason it also became an essential part of my routine. My roots feel stronger, and my scalp stays cleaner for longer.
Perfect Perfect
After using No.0.5 Scalp Longetivity Treatment is an absolutely 10/10, it's a game changer product that you can tell the difference from the very first application, after showering. I was very impressed with Olaplex because it's super lightweight deeply nourishing, absorbs in just seconds and it's doesn't have that greasy residue, my hair feels softer, shinier and much easier to play it with it.The applicator it's super nice and goes all throughout the scalp. I love the nice and fresh smell that it has, that makes me feel like I'm at the spa. It didn't irritate my scalp. This product really helped me with my dry hair and lack of shine, that for that reason it also became an essential part of my routine. My roots feel stronger, and my scalp stays cleaner for longer.
Real relief for my scalp
Hair Type Wavy Hair
I never really included scalp treatments in my routine, but this product changed my perspective. The texture is lightweight and almost watery, and the nozzle makes it super easy to apply directly where you need it. From the first use, it felt refreshing and calming. I have a sensitive scalp and often deal with itchiness and flakiness, especially after washing my hair. Since using this treatment, I no longer feel itchy, and my scalp feels hydrated, healthy, and completely flake-free. I also noticed that my roots look stronger and overall healthier. It's a subtle but steady improvement, and it's now a staple in my routine. I'd recommend it to anyone who's never given their scalp the attention it deserves. This product was provided for promotional purposes in exchange for my honest review.


Best result
As someone who's always on the lookout for ways to keep my hair and scalp in top shape, I was really intrigued when I saw OLAPLEX launch their N°. 0.5 SCALP LONGEVITY TREATMENT. I've been a long-time fan of some of their other products for hair repair, so a dedicated scalp treatment from them definitely piqued my interest. First off, let's talk about the packaging. It's consistent with the rest of the OLAPLEX line – simple, clean, and feels professional. The nozzle applicator on this one is a nice touch; it makes it super easy to get the product directly onto the scalp without wasting any. Using it was straightforward. I applied it to a damp scalp, section by section, and then gently massaged it in. The texture is lightweight, not greasy or heavy at all, which is a big plus for me as I don't like products that leave a residue. It also has that signature, very mild OLAPLEX scent, which is barely noticeable and dissipates quickly. Now, for the results. After just a few uses, I started to notice a difference. My scalp, which can sometimes get a bit itchy or feel a little tight, felt significantly more comfortable and soothed. It seemed to calm down any minor irritation I had. What truly impressed me was the feeling of overall balance. My scalp felt less oily at the roots, but also not stripped or dry. It felt... healthier. While it's not a direct hair growth product, I do feel like a healthier scalp environment could contribute to better hair growth over time, or at least help maintain the hair I have. My hair also seemed to have a bit more lift at the roots, which I attribute to the improved scalp health. This product was provided for promotional purposes in exchange for my honest review.