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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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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...
176 results
Smells horrendous
Received this product as a mini gift with purchase and was excited to test it out. Typically I love olaplex scents like their shampoos, conditioners, no5 (leave in hair treatment), and no7. This one smelled like old dirty socks and that itself is an understatement. At first I thought I was trippin out about the smell but my bf came to kiss me on the forehead, made a stank face, and asked if I even washed my hair bc my scalp smelled horrible. The smell slowly went away after blowdrying and it settled down overnight. I'm not sure if it was the batch I received but aside from the smell, it didn't really do anything for my scalp so it went straight into the trash!
Meh… There's Probably a Better Option Out There
I got this as part of an Olaplex kit I bought, so I initially wasn't looking for this product. My scalp can sometimes get dry and itchy in the winter, but usually my biggest issue is greasiness and buildup. I've tried it a few times this winter and so far, I have not noticed any difference with it. It could be that I never had a problem for it to fix, though.
re-purchase
Hair Type Very Curly Hair
This is my second time buying this for my dry itchy scalp. It works. It's kind of pricey but I'll keep buying it until the price goes out of sight.
Only thing that has soothed my scalp
I even went to the dermatologist for my itchy scalp and nothing helped as good as this did. It takes consistency for about two weeks and half the bottle in that time, but my rough patches on my scalp are finall softened and fhe itchiness is way down.
Underwhelming
Hair Type Straight Hair
I used the Olaplex Nº.0.5 Scalp Serum Treatment consistently and followed the directions, but I didn't notice any real difference in my scalp health or hair. It didn't irritate my skin, I'll give it that much, but given my results with other products from this brand I expected to see some visible results. During the summer I swim a lot and it often causes me to have flaky scalp. After using this, I still have flaking as you can see in the photos. A scalp serum should either invigorate, calm, reduce flakiness, or help with shedding and this didn't check any of those boxes for me. It might work better for others with different scalp needs, but in my experience, it just felt like an extra step with no results. I wouldn't recommend this product based on my experience. This product was provided for promotional purposes in exchange for my honest review.

