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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
Amazing product
I'm genuinely obsessed with this product has completely transformed my hair routine. I'm beyond grateful I found it! My hair feels thicker, healthier, and so much more hydrated. I can actually see the results — a clean, nourished scalp and stronger, fuller strands. It's like a fresh, healthy flow of growth has been unlocked. Highly recommend if you're looking to bring life back to your hair and scalp!

Very good product to keep you're scalp healthy
I've been using this Scalp Treatment Serum consistently over the past few weeks, and I've seen some genuinely promising results. *My scalp feels less dry and itchy. *I've noticed less flaking, especially around my hairline. *Some baby hairs have started to come in, which is exciting. *Overall, my roots feel healthier and a bit fuller. This scalp serum exceeded my expectations. It's easy to use, feels great on the scalp, and has already made a visible difference in how my scalp looks and feels. I received this product in exchange for my honest review. All opinions are my own

Sooo soothing!
The Olaplex scalp serum has been a wonderful addition to my hair care routine! This product is very versatile, you can use it either after you shower on wet hair, or on dry hair as an overnight treatment. I tended to prefer the former, since my hair can tend to get greasy pretty fast, but I really enjoyed this when applied after my shower. I would part my hair in bigger sections, and applied a finger-long amount to my scalp and massaged it in. This helped a lot with soothing my scalp from dryness and flakiness (especially after using dry shampoo and hairsprays the days prior to hair wash day) without weighing my hair down or making it feel greasy, and it even helped with some of my dandruff! I think this product is great for most (if not all) hair types, and it also only has a light fragrance that I really appreciate! This product was provided for promotional purposes in exchange for an honest review.
User friendly scalp treatment helpful addition to routine
Its a struggle as a consumer with fine, thin hair to find products that work for my hair type. With the Olaplex Scalp Longevity Treatment I was impressed by the great applicator. It helps with targeted application and dispensed the right amount of product where you need it. The formula was light and non greasy. It was less liquid and more gel like. It was easy to apply, was easy to work into the scalp and has a light, pleasant scent. I experienced a noticable cooling sensation on application and that was helpful as it let me know where the product had absorbed. After 28 days of use I noticed my scalp felt less itchy and I had less buildup and longer times in between washes as my scalp was less greasy. I was only able to use this product consistently as an overnight treatment as my hair texture is very easily weighed down by any kind of gel treatment. I would recommend this product to anyone looking for an addition to their routine to help with scalp buildup. The Olaplex Scalp Longevity treatment was provided to me in exchange for my honest review.

Great to support healthy scalp!
As an esthetician, I know how important prevention and consistency are in maintaining skin health—including the scalp. But effective, high-quality scalp care products have been hard to find until now. I have a sensitive, reactive scalp, and the first time I used this was after a detox product that left me feeling a bit itchy. OLAPLEX N°.0.5 Scalp Serum instantly soothed the discomfort. It hydrates without being greasy or sticky at the roots, and a little goes a long way. This has become a go-to in my scalp care routine—lightweight, calming, and a perfect preventative treatment. Highly recommend for anyone looking to support a healthier scalp environment!