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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
Hydrated my scalp in a short time!
I received this product in exchange for an honest review! I struggle hardcore with finding the proper products to help my dry and flaky scalp. I have even been to a dermatologist to help find something that would help reduce redness, flakiness and itching but to no avail! So with that said, i was a little skeptical about this product but was pleasantly surprised with the outcome! To begin, i love the packaging that dispenses this product. The small tip makes it easy to apply the serum to your scalp without coating all of the hair in the way! It worked perfect for reaching harder to reach areas and provided good coverage. Additionally, this product had minimal smell, if anything, which i can appreciate as it didnt mess up the smells with my other hair products. The best part of this product for me is that it didnt have harsh chemicals that left stinging or burning sensations. I only knocked a star off becausw it is kinda greasy if it gets in your hair strands, so best used with wet hair or at night, as the bottle states. Overall, i could see an improvement in hydration and overall reduced flakiness. I would recommend this product!
I would buy it again
As soon as I applied this serum, my scalp felt cool, refreshed, and super hydrated. It absorbs quickly and doesn't leave any greasy feeling, which I love. After a couple of uses, my scalp felt balanced, less itchy, and my hair looked shinier from the root. If you love that "clean scalp" sensation this gives you exactly that. Wish the bottle was bigger, though!

Hydration, hydration, hydration
As an esthetician who has worked in the beauty industry for over 28 years, I am a stickler for my clients protecting their scalps from the sun and using treatments as "skincare" for the scalp. Lately, though, I had a reoccurring cycle that I just could not seem to break. If I tried to skip even one day of shampooing my hair, by the end of day two my hair was oily and flaking, regardless of applying a dry shampoo. So, I used a detox shampoo to remove residual product, only to end up with a tight, dry scalp that is irritated and still flaking. Presumably from more than one issue, now. Enter Olaplex No. 5 Scalp Longevity Treatment. The product in this simple little white tube helped in every way to get my scalp back to it's healthy normal in very little time. I dotted it throughout my hair and used it 2 times a week as an overnight treatment, and I love the results. The cream serum has a subtle fresh scent, and is not sticky or oily. In fact it absorbs and hydrates immediatel. That hydration was exactly what my scalp was needing to stop producing so much oil. Highly recommended for anyone experiencing dry or oily scalp. This product was provided for promotional purposes in exchange for my honest review.


Love it!
As someone who frequently colors and bleaches my hair, I'm always looking for products that can help maintain scalp health despite the chemical processing. The N°.0.5 Scalp Longevity Serum Treatment has become a valuable weekly addition to my routine. What impressed me most was how quickly it addressed a specific issue I was having. When the product arrived, I had an irritated, itchy spot along my hairline that had been bothering me for days. After just one day of using the serum, the irritation had cleared up significantly. I appreciate the versatility of this product. You can apply it to wet hair before styling or use it as an overnight treatment on dry hair. This flexibility makes it easy to work into any routine. For anyone with chemically processed hair or general scalp sensitivity, I'd definitely recommend giving this serum a try. It's become a reliable part of my hair care regimen.


What a big difference this makes!!
After using Olaplex before, I had pretty high expectations, and this definitely did not disappoint! After having my son, I've noticed a loss of density and fullness throughout my hair, so I was grateful to get to try this item out. I used it almost daily, as a treatment and let it sit for about 10 minutes. Super quick and easy to use, and I could feel and see my hair strengthening and looking less sparse within 2-3 weeks! It didn't have much of a smell, nor does it leave any type of greasy or waxing feeling and buildup on your scalp. This has easily become one of my favorite and most cherished hair treatment products I've tried. I'm so thankful to get gotten to latest this is exchange for my honest review!