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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
Scalp Feels Better
Olaplex scalp longevity treatment is a game changer if you suffer from a dry, flaky scalp. It is extremely simple to use and a little goes a long way. My scalp felt hydrated instantly. Only downside is the bottle is small but it does last.

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 understanding). I have sensitive skin and live in a very sunny, very humid, very salty, and very pollen filled Florida climate. Despite my skin's (and my scalp's) sensitivity, I prefer to shower twice a day and wash my hair at least once a day. A few years ago, I moved into a hard water situation (installing a water softener is out of the question). I've become fond of glycolic acid to reduce hard water build up in my hair and scalp while at the same time, I've outgrown old friends - silicone anti-frizz products that used to work wonders for me now just make my hair look weighed down and greasy. I tried Olaplex over the past 4 weeks, and I used it not once but twice a day after each shower. Many days, I only washed my hair one of those times. I found Olaplex to behave as both a leave in conditioner and volumizer. It never weighed my hair down, and it never left any residue. I ended up ditching the daily leave in cream I was using for Olaplex this past month. I would love to go full throttle forever; however, the price of this item precludes that for me. I'll likely either need to slow my roll (and go to once a day or only a few times a week) or swap my diet of pricey vegetables for ramen noodles because at the rate I'm going, I'd probably go through a tube of this every 6 weeks. The scalp treatment is very thick -- good in terms of it can stay where you place it, but bad in terms of covering the entire scalp with ease. It felt like nothing in the best possible way. My headline/rating is based on a Wine Enthusiast scale. This is a very good product; however, I reduced points because I had trouble covering my entire scalp and I like it well enough for it to get a bit expensive. If your tendencies for use are more conservative than mine (i.e., you would use this only a few times a week), I highly recommend. My concerns about price being said, I'll likely repurchase (and sadly reduce use). ***This product was provided for promotional purposes in exchange for my honest review.***


A dry scalps nightmare
This Olaplex scalp longevity serum is the perfect addition to my haircare routine! As a dry girly, I suffer from dry/flaky scalp regardless of the season. In the summer, even the slightest bit of sun will burn my scalp and I will peel for days. This scalp serum is gentle, non-greasy, and perfect for adding moisture back into my dry scalp. I typically use it a few hours before I wash my hair and let it sit, or right after I wash my hair (while my hair is still damp) and before I blow dry. It seems to have really made a difference in the past week or so that I have been using it! Definitely will be recommending to all my dry girls! This product was provided for promotional purposes in exchange for my honest review
Great treatment for sensitive scalps
As someone who struggles with seborrheic dermatitis on my scalp and has had significant hair loss after weight loss, this scalp treatment has been a great step toward getting addressing my concerns. I've noticed that my scalp is less itchy, my hair has grown, I have baby hairs coming in, and even my lengths are less frizzy and more manageable. The needlenose packaging makes the treatment super easy to apply compared to other hair treatments and I usually apply it the night before hair washing days as an overnight treatment. I've always loved Olapex's whole line and think it's one of the few brands that consistently and quickly delivers the results it promises. You can see improvement after just one use and I'm happy I was able to add this to my routine. This product was provided for promotional purposes in exchange for my honest review


Fantastic treatment
I've been using the Olaplex No.5 Scalp Longevity treatment for a solid 30 days now and my scalp has felt amazing, very soothed and nourished. I love that this isn't just another old serum and the fact that it's backed by Olaplex's Bond Building Technology, so it supports not only your scalp but also the strength of your hair at the root. After just a few uses, I noticed less dryness, reduced irritation, and even fewer dry scalp flaking. Plus, it's lightweight, non greasy, and fast absorbing without the weird buildup or residue. I really like the fresh scent of this product and how well it worked with my other Olaplex products. This is definitely worth trying, especially if you are serious about your hair health. Your roots and your stands will thank you!