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OLAPLEX N°.0.5 Scalp Longevity Serum Treatment
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Highlights
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
Review 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...
180 results
Soften & refreshes my scalp!
Hair Type Very Curly Hair
I enjoy using this product with the applicator being very easy to use as a guide through my scalp. This product served my dry and itchy scalp and removed the flakes from my scalp during wash day. This product has a thin consistency, which is easy to seep through the scalp and cure the itchiness. My scalp looks healthier and my hair feels a bit softer.
No. 0.5 Scalp Longevity Treatment
Hair Type Very Curly Hair
I recently tried the Olaplex No. 0.5 Scalp Longevity Treatment and was impressed by how refreshing it felt after washing my hair. The serum glided smoothly onto my wet 3C curls and instantly gave my scalp a hydrated, clean feeling. It has a light, pleasant scent that lingers just enough without being overpowering. I love that it's suitable for all scalp and hair types, which makes it a great universal treatment. The colorless formula has a silky texture that feels luxurious and absorbs well without leaving buildup. A little goes a long way, so you don't need to overuse it. However, I did notice that when applied to my dry scalp, it felt a bit itchy, which was a drawback. Also, the tube is quite small for the price, so I reserve it for targeted use only when needed. It would be helpful if the product came in a slightly larger size for more regular use. Despite those minor issues, it's still a high-performing scalp treatment that I'd keep in rotation for wash days.

Soothing Scalp
Hair Type Wavy Hair
I have an extremely dry/ itchy/ irritable scalp. It is sensitive and often very flaky. I struggle with dandruff and dry skin, leading me to scratch my scalp leaving redness/scabs. It is miserable! I have tried several scalp products and this Scalp Longevity Serum Treatment by Olaplex truly does what it says it does. After using this twice a week for three weeks I have noticed a drastic improvement in my dry skin. I have way less dandruff and it is not as itchy, so I do not have scabs from itching. There is very little scent which I appreciate. The only reason I took off one star is because you are supposed to be able to use it on clean hair but it makes it SO greasy. I would only recommend using it as a treatment prior to washing your hair. This product was provided for promotional purposes in exchange for my honest review. Overall, it does the job and I would highly recommend it!


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.