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Beauty
The Ordinary
The Ordinary Multi-Peptide Serum for Hair Density
A no-frills, peptide-heavy scalp serum from the brand that made ingredient-forward skincare accessible — now applied to hair density.
From $21.60as of Sep 26, 7:18 PM UTC
Why we picked it
The Ordinary brings its familiar approach here: a long ingredient list, a modest price, and nothing extraneous.
Size
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Our verdict
The Ordinary brings its familiar approach here: a long ingredient list, a modest price, and nothing extraneous. The formula layers several peptide and plant-based technologies aimed at a fuller-looking scalp over time, and the once-daily leave-in application is easy to fold into a bedtime routine. It's less suited for anyone wanting instant texture or shine benefits — this is a slow-play, scalp-focused treatment, not a styling product.
Best for: Consistent scalp-care routines on a budget
What we like
- Multiple peptide technologies including REDENSYL, CAPIXYL, and AnaGain
- Lightweight leave-in formula — no rinse required
- Alcohol-free and silicone-free
- Vegan, cruelty-free, and gluten-free
- Straightforward once-daily application
What to consider
- Results are gradual — this is a long-term scalp treatment, not a quick fix
- Applied to a dry scalp at bedtime, so factor in pillow contact if that's a concern for you
- A few drops daily means bottle longevity depends on how much scalp area you're covering
- Leave-in format means buildup is possible for those who wash hair infrequently
Product details
- CONCENTRATED HAIR TREATMENT: A lightweight leave-in serum designed to promote thicker, fuller, and denser-looking hair by supporting the scalp.
- PEPTIDE TECHNOLOGIES: Formulated with REDENSYL, Procapil, CAPIXYL, BAICAPIL, AnaGain, and High-Solubility Caffeine to visibly enhance hair vitality and promote a denser appearance.
- PLANT-BASED EXTRACTS: Contains natural ingredients such as Larix Europaea Wood Extract, Pisum Sativum Extract, and Camellia Sinensis Leaf Extract to nourish the scalp.
- DAILY USE: Apply a few drops to clean, dry scalp once daily, preferably at bedtime, for optimal results.
- FREE FROM: Cruelty-free, gluten-free, vegan, alcohol-free, and silicone-free.
Researched recommendationPublished May 11, 2026Updated August 13, 2026
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