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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
my scalp loves this
Ive tried this product for the past 25 days. I use it 2 days after every wash cycle! I has helped tremendously with my dry scalp. I have super thick dense hair, and it either gets oily pretty quickly, or my scalp starts flaking. This product has helped me control some of the flaking and i am so thankful for that! This product was recieved for promotional purposes in exchange for mu honest review.
Healthy Scalp
I've been using the Olaplex Nº.5 Scalp Serum for a few weeks now and I'm genuinely impressed. My scalp tends to get dry and irritated, especially during seasonal changes, but this serum has brought noticeable balance and relief. It feels super lightweight — not greasy at all — and absorbs quickly, leaving no residue. After consistent use, my scalp feels healthier, less flaky, and more hydrated. I've also noticed less hair shedding in the shower and my roots seem fuller. It's packed with peptides and Olaplex's signature bond-building technology, so it feels like you're not just soothing the scalp but actually strengthening it from the root. I love that it's fragrance-free and gentle enough for sensitive skin. A little goes a long way, and the dropper makes it easy to apply directly to problem areas. Overall, if you're looking to show your scalp some love and promote a stronger foundation for hair growth, this is 100% worth trying.
I will be using this daily.
I really like this stuff. I use it kind of like a hair mask. I put it on before bed and let it sit in my hair until morning when I wash it out. It leaves my scalp feeling clean and refreshed. I feel like it helps with my oil control as well. I have incredibly oily hair but with this product it cleans my scalp and helps keep oil away longer. The application is seamless and easy. The tip on it makes it incredibly easy to get on your scalp evenly and throughly. My hair feels stronger at the roots and is growing nicely. My hair all around just feels healthier, nicer, stronger softer not as damaged in the scalp area as it gets with how much product I use on it. The product itself also just feels nice on the head almost cooling. I would recommend this to anyone that is looking for just an extra way to strengthen their hair. It also seems to leave a nice shine on my hair that I don't normally get. This product was sent to me in exchange for my honest review


I will be using this daily.
I really like this stuff. I use it kind of like a hair mask. I put it on before bed and let it sit in my hair until morning when I wash it out. It leaves my scalp feeling clean and refreshed. I feel like it helps with my oil control as well. I have incredibly oily hair but with this product it cleans my scalp and helps keep oil away longer. The application is seamless and easy. The tip on it makes it incredibly easy to get on your scalp evenly and throughly. My hair feels stronger at the roots and is growing nicely. My hair all around just feels healthier, nicer, stronger softer not as damaged in the scalp area as it gets with how much product I use on it. The product itself also just feels nice on the head almost cooling. I would recommend this to anyone that is looking for just an extra way to strengthen their hair. It also seems to leave a nice shine on my hair that I don't normally get.


Fresh, clean hair — gentle and effective!
I absolutely loved the Olaplex Scalp Longevity Treatment No. 0.5! It's suitable for all scalp and hair types, and I could feel the difference from the first use. My hair feels fresher for longer, and I don't need to wash it as often, which is a huge plus for me. The scalp treatment itself is very gentle — no tingling, no discomfort, just a pleasant and relaxing sensation. I also really enjoyed the scent: it's fresh, clean, and very neutral — not overpowering at all. Overall, my scalp feels healthier, my hair looks cleaner and more vibrant, and the whole experience is incredibly pleasant. Highly recommend! *This product was provided for promotional purposes in exchange for my honest review
