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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
A Reset Button for my Scalp!
Been using Olaplex Nº 0.5 for a few weeks and love it! It's lightweight, non-greasy, and feels like a mini spa for your scalp. My scalp feels soothed, less dry, and more balanced. Great for all hair types; definitely worth trying for scalp health!


Noticeable differences after use!
I really enoyed using this product because i suffer from a very dry scalp that often leaves red skin and flakes. After using this serum, i found that my scalp was visibly more hydrated and found less flakiness or itchiness after. The main thing i enjoyed is that the product doesnt sting or irritate my scalp like a lot of other products do. I used this at night after my showers and let it sit overnight. In the morning, my scalp feels refreshed and is easy to style. The applicator tip is also a pro because it makes it easy to apply to your scalp and not get your hair coated in serum. If it does get coated, it is a bit sticky or greasy feeling. Overall, i would recommend this product for those who suffer from dry scalp! I received this product in exchange for an honest review.
Works fine
I have oily hair and skin, but have been having some issues with thinning hair and a spot that is dry and flakey with some itching as well. I started using this product on damp hair after my showers and noticed that sometimes it would make it go where my hair got oily quicker and I had to wash it before my typical wash day. I decided to try applying it to my dry scalp at night before my wash day and wash it the next morning. I found this to work way better for my hair and scalp. I did not notice any more hair growth from using this product, but it did help with the flakiness and itching. I also felt that after switching to night time use I could go a bit longer without washing my hair! This product was given to me as part of a promotion in exchange for my honest review.
Hydrate your scalp
I've struggled with a dry, sensitive scalp for a long time, and most products either don't help or end up making the irritation worse. This one has truly stood out. From the first use, I noticed how soothing it felt, and over time it's helped keep my scalp hydrated and calm without any flare-ups or discomfort. What I really appreciate is the packaging—the squeeze tube with the pointed nozzle makes it so easy to apply the product exactly where it's needed, especially at the roots. I don't have to worry about wasting product or making a mess. It's clear that this was designed with both effectiveness and convenience in mind.

Best Scalp Treatment!!
Olaplex No. 0.5 scalp longevity weightless Treatment formulated to hydrate, soothe, and strengthen the scalp barrier. I am obsessed with this. I love Olaplex as a brand and their love for hair bonding technology as well as ingredients that are effective and worthwhile. It truly is serum like in the sense that it is lightweight and does not weigh your hair down. This is on the thinner side so a little does go a long way and really works well into the scalp and absorbed fast.This serum is suitable for all hair textures. We can all benefit from a healthier scalp, no matter what kind of hair we have. It feels cooling, refreshing, lightweight, and has a slightly pleasant fragrance. OLAPLEX truly helps you achieve a salon experience at home with their haircare products. I'm excited to keep using this to see if I notice any changes to the overall health of my hair with the continued nourishment of my scalp.
