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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
Must try!
I have been a huge fan of scalp care to help with new growth, thicker hair, and all around healthier looking hair. Before I shower, I use one of those scalp detox brushes. I use a detox shampoo as well, and then I will apply the Olaplex treatment when I am ready to style my hair. I truly did feel like this product left my scalp more hydrated. Sometimes I get an itchy scalp and I didn't experience that at all when I used this. I apply this on wet hair before styling, and I had no problems - my hair didn't feel sticky or like it had product in it, and it didn't make my hair dry or crunchy. I didn't try it on dry hair. It's a bit hard to tell, but in my before and after picture, you can see a lot more baby hairs. This product is definitely worth a try. Product was received as part of an educational promotion
Nourishing for the scalp!!
This Olaplex Scalp Longevity serum is nice! It is super light weight, doesn't grease up the hair too much, so I was able to put it in overnight, and when I was going to the gym. Doesn't really have a scent, and I'm fine that they it didn't. I also was pretty pleased that it washed out of the hair very easily, because I hate when serums are way too greasy for the scalp and take forever to get out. My hair is naturally super oily at the roots, but this felt super refreshing and didn't add more oils. If anything it helped to nourish the scalp and prevent oiliness from happening. I really enjoyed using the serum, and love that a little goes a long way ! It'll be in my routine for a while. This product was provided for promotional purposes in exchange for my honest review


Healthier hair and scalp
I love the OLAPLEX shampoo and conditioner, so I was excited to try their No. 0.5 Scalp Longevity Treatment. I'm in my late 40's and really haven't done much to improve my scalp health. This product is quick and easy to fit into my morning routine. I have a naturally oily scalp, but it gets itchy (I suspect it's due to hard water). Since regular use of this treatment, my scalp has all but stopped itching which I am very impressed by. A little of the product goes a long way, and it doesn't leave any greasiness or stickiness behind. My hair has stated to look a bit healthier and shiner, but the difference in my scalp itch is what I am most impressed with. It is a bit pricey, which is the only downside. This product was received as part of an educational promotion
Great for scalp care!
I'm really enjoying this treatment. The texture is similar to a serum, very lightweight, not thick or greasy at all. It feels completely weightless on my scalp which I really like, and leaves no residue behind. After blow drying, my scalp feels hydrated and my hair feels super soft. I have a dry, frequently flaky scalp, and this treatment is definitely helping. I use skincare to strengthen my skin barrier, so it really makes sense to use haircare to strengthen my scalp barrier. And I always appreciate the fact that Olaplex products are silicone-free. My hair is fine and straight, and silicones just weigh it down, so I always look for silicone-free haircare. This product was provided for promotional purposes in exchange for my honest review.
Scalp Hydration-Hair Transformation!
I've been using the Olaplex Scalp Advanced Serum and it's quickly become a staple in my routine. From the first application, my scalp felt instantly hydrated and soothed—no tightness or dryness, just relief. Over time, I've noticed my scalp feels more balanced and less irritated, which I credit to the barrier-supporting ingredients. It's also made a difference in the overall look and feel of my hair—softer, shinier, and visibly healthier. I love that it's not just hydrating but also has anti-aging benefits, something I hadn't considered for my scalp before. It absorbs quickly, isn't greasy, and has that signature Olaplex scent. A game-changer if your scalp needs a little extra love and care.