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Highlights
Summary
The Ordinary's Multi-Peptide Serum for Hair Density is a lightweight serum for fuller, healthier-looking hair.
Benefits
- A solution for visible hair thickness and fullness
Formulated Without
- Fragrance
- Sulfates
- Mineral Oil
Item 2606203
Apply a few drops or as needed once daily, ideally at bedtime, to clean, dry scalp. Massage into scalp thoroughly. This formula is a leave on/in treatment. Do not wash hair or scalp after application. If irritation occurs, cease use and consult a physician. Use only as directed on unbroken skin. Patch testing prior to use is advised. Refer to The Ordinary's in-depth guide to patch testing. Keep out of reach of children.
Aqua (water), Propanediol, Butylene Glycol, Glycerin, Caffeine, Biotinoyl Tripeptide-1, Acetyl Tetrapeptide-3, Larix Europaea Wood Extract, Pisum Sativum Extract, Scutellaria Baicalensis Root Extract, Triticum Vulgare Germ Extract, Glycine Soja Germ Extract, Trifolium Pratense Flower Extract, Camellia Sinensis Leaf Extract, Apigenin, Oleanolic Acid, Arginine, Glycine, Calcium Gluconate, Zinc Chloride, Lactic Acid, Gluconolactone, Dextran, Maltodextrin, Hydroxyethylcellulose, Xanthan Gum, Pentylene Glycol, Dimethyl Isosorbide, Polysorbate 20, PPG-26-buteth-26, PEG-40 Hydrogenated Castor Oil, Trisodium Ethylenediamine Disuccinate, Sodium Metabisulfite, Sodium Benzoate, Phenoxyethanol, Chlorphenesin.
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Questions
Ask a QuestionQ&A
Showing 5 out of 44 Questions
- Q
Can i used this serum once week at night with rosemary hair oil too or should the serum be used alone.
- Asked by fawn
- Official Answer By The Ordinary - Brand EngageUnfortunately, it is difficult for us to comment on the pairing of our products with those of other brands. We recommend consulting with your doctor/dermatologist, gradually incorporating one new product into your regimen at a time, and applying test patches first to see what works best for your skin.Was this answer helpful to you
- Q
Will this make my hair greasy? Do I apply it everyday?
- Asked by jadyn c
- Official Answer By The Ordinary - Brand EngageHi there, the formula is quite lightweight and shouldn't leave your hair feeling greasy. We'd recommend massaging a few drops thoroughly into a clean, dry scalp once daily, ideally at bedtime.Was this answer helpful to you
- Q
Can this product be used for eyebrows?
- Asked by Meeks
- Official Answer By The Ordinary - Brand EngageHi there. For eyebrows, we recommend our The Ordinary's Multi- Peptide Lash & Brow Serum as it has been specifically formulated for use on the brows.Was this answer helpful to you
- Q
How does it make the hair look thicker/fuller
- Asked by Bos
- Official Answer By The Ordinary - Brand EngageThe multi-peptide hair serum is a combination of a number of peptides that work by visibly strengthening, normalizing the scalp, and strengthening the hair follicle through various pathways. We hope this helps!Was this answer helpful to you
- Q
is this a hydrating serum?
- Asked by Maria
- Official Answer By The Ordinary - Brand EngageHi there, this will have a slight hydrating effect as it's a water-based serum but the main target is scalp support for thicker, denser, fuller-looking hair. If you'd like something a bit more nourishing to the scalp, you may wish to explore our Natural Moisturizing Factors + HA for Scalp. We hope this helps!Was this answer helpful to you
Reviews
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Most Helpful Positive Review
Not just baby hairs - it works!!
This review is long overdue but given the rate of natural hair growth I wanted to ensure it wasn't just fuzz, baby hairs, or wishful thinking. As you can see I also have some psoriasis on my scalp before I began and still. This product had no affect, neither positive or negative, on the psoriasis ...
Most Helpful Critical Review
DECIEM will not disclose content concentration
This product is in large part marketed on the fact that it contains REDENSYL. There's some clinical evidence that REDENSYL promotes hair growth. However, DECIEM will not disclose the concentration of REDENSYL in this product, making it impossible to compare with alternative products containing the i...
865 results
Never leave reviews, but needed to for this!
Hair Type Wavy Hair
Been using this serum since Dec 2025 & the biggest difference I'm seeing is that it has decreased hair fall out by almost half! Haven't noticed baby hairs but my hair is growing length wise! Also use it with the Abbey Yung method & my hair loves it
It works very well for me
I have natural type 4 hair. I have been battling with traction alopecia for about 10 years. And my hairline is filling in very nicely. I'm so pleased. My advice is to stop the high tension hairstyles ASAP. Use this on your edges. Keep your scalp clean have a good routine and massage your scalp as much as possible. Take your vitamins drink your water and have a good diet.
Actually works
Hair broke off after getting braids. Been using these drops on average 4 times per week (mainly because I forget to use everyday). These results are within 3 months and I still have about 1/4 of the bottle left.
Causes breakouts
Used this very consistently for a month, didn't see any changes in the condition of my hair but experienced a lot of ance around my hair line. Had to stop using
I'm just happy my hair is growing back 
If you follow the directions it works honestly pretty well especially for the cost!