Nº 0.5 Scalp Longevity Treatment, 1.7 oz.

4.7 (330)
$44.00
Size:1.7 oz
Offers & perks
$10 Star Money for $100
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Product details

Web ID: 24257556

Soothe and hydrate your scalp with this Olaplex longevity treatment, designed to help strengthen the scalp barrier. It promotes soft, shiny, and balanced hair.

  • Product Features

    • WHAT IT IS:
    • This weightless scalp serum immediately hydrates and soothes the scalp as it protects against accelerated scalp aging to promote hair health over time
    • WHAT IT DOES:
    • It hydrates and soothes scalp, strengthens and protects scalp barrier and microbiome
    • INGREDIENT HIGHLIGHTS:
    • Formulated without sulfates, silicones, phthalates, phosphates, paraben, MIC/MIT, protein.
    • HOW TO USE:
    • Part hair with needlenose applicator. Squeeze gently and apply directly to scalp. Continue for as many sections as needed. Our 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.
    • HAIR TYPE:
    • Ideal for all hair and scalp types
    • This item purchased online must be returned to the vendor by mail only. This item cannot be returned to Macy's stores.

  • Shipping & Returns

    • This item purchased online must be returned to the vendor by mail only. This item cannot be returned to Macy's stores.
    • California and Minnesota customers call 1-800-289-6229 for Free Shipping information.
    • For complete details, see our Shipping and Returns policies.

Ratings & Reviews

Here's what customers think
  • The Olaplex No. 0.5 Scalp Longevity Treatment is a versatile scalp treatment that provides immediate relief and lasting protection.
  • The lightweight, non-greasy formula absorbs quickly, leaving hair feeling softer, shinier, and more manageable, with reduced breakage and improved overall health.
  • The product is suitable for various hair types and helps strengthen the scalp barrier and balance the microbiome.
  • Users report that it keeps their roots fresher for longer and promotes stronger, healthier hair growth.
AI-generated summary from 330 customers reviews.
4.7/5

330 star ratings & reviews

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330 reviewssorted by Newest

Jazzyjuggz10
12 days ago

Feels great on my scalp

One of the biggest strengths of this treatment is its focus on scalp health as the foundation of hair health. Many products prioritize shine or softness of the hair itself, but OLAPLEX No. 0.5 shifts attention to the environment where hair grows. With continued use, the scalp feels more balanced—less dry, less irritated, and noticeably calmer. For those who struggle with itchiness or tightness, this can be a significant improvement. It doesn’t feel like a harsh or medicated solution; instead, it works gradually to restore comfort.

Recommends this product

Customer review from OLAPLEX

KMCC
2 months ago

Smells Awful

it wreaks! put my cat on edge trying to figure out the disturbing smell, as well as myself. I thought mine had gone bad until I read the other reviews. smells absolutely awful.

Customer review from OLAPLEX

Darby
2 months ago

Invest in your haircare

I have been using for over six months… my hair is stronger. Excellent for menopause women’s and hair coloring ! Good investment

Recommends this product

Customer review from OLAPLEX

Laurel
2 months ago

Intolerable smell

This product smells awful. Like the yeast byproducts of making beer or worse. I literally couldn’t sleep after trying it for an overnight treatment, it was that strong and that bad. I was really stunned because everything else I’ve tried from Olaplex has a pretty mild pleasant/neutral scent (No. 3, 4, 5, 5 leave-in, 6, 7, 8, 9). Returning this; even if it somehow provides good benefit to the scalp there is no way I could tolerate that smell ever again. The bottle even suggests you could use it as part of your styling routine— go out in public after applying that?! Absolutely not. Anyway, I do not normally write reviews but I wanted to provide this PSA to y’all— do not waste your money on this one. Will stick with my other Olaplex faves; I do highly recommend No. 4, 5, 5 leave-in, 7, and 9.

Customer review from OLAPLEX

Ary97
2 months ago

Why this smell so bad as a old cheese. It's my first time using this but for this price unless should smell a little bit better

Customer review from OLAPLEX

Lynn26
3 months ago

Pleased

I bought this product when it first came out. I use it once a week, the night before I wash my hair. I have noticed there is less hair in my drain after washing my hair. Also noticed more little hair growths. Only downsize is the product smell. It is not a pleasant smell.

Recommends this product

Customer review from OLAPLEX

Lynn H
3 months ago

Scalp treatment

Great product. Very soothing on my scalp. Does not leave my hair looking or feeling oily.

Recommends this product

Customer review from OLAPLEX

Daizy5
3 months ago

Love using scalp longevity cream.

This product feels absolutely revitalizing to the scalp. I get my hair colored and the scalp will feel dry and itchy. When I put this on the scalp and massage it in it actually feels as it the product just gave me a super healthy scalp. I like using it at night after massage so it can help all night.

Recommends this product

Customer review from OLAPLEX