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Apply a small amount of the product onto a clean area of skin on the upper forearm.
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Keep the area dry.
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If the product has a specified duration of use, rinse off after this time has elapsed. Otherwise rinse off after 24 hours.
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If any redness, burning, itching, blistering or irritation is observed at any time throughout the test, do not use the product.
Targets Hair
Suited for All Hair Types
Format Serum: Water-Based
Overview
Discover if this product is right for you:
Product Details
Testing Shows
Highlights
- ph
- 4.80 - 5.80
- water-free
- No
- alcohol-free
- Yes
- oil-free
- No
- silicone-free
- Yes
- vegan
- Yes
- gluten-free
- Yes
- cruelty-free
- Yes
Awards & Features
Multi-Peptide Serum for Hair Density helps to improve the appearance of hair thickness and fullness, by helping increase the thickness of hair fibres. The lightweight hair density serum, with several peptide and plant-extract technologies, helps combat the appearance of hair thinning by making hair strands look more dense for a healthier look:
- REDENSYLTM:
- A complex of sodium metabisulfite, European larch extract, glycine, zinc chloride and green tea extract
- AnaGainTN:
- An extract of pea sprouts rich in phytonutrients
- ProcapilTM:
- A complex of apigenin from grapefruits, oleanolic acid from olive leaves and biotinoyl tripeptide-1 which helps boost scalp energy
- CAPIXYLTM:
- A complex of biomimetic peptide acetyl tetrapeptide-3 with red clover extract
- BAICAPILTM:
- A complex of Chinese skullcap (a source of baicalin) supported by soy and wheat germ extracts
- High-solubility Caffeine:
- Helps boost scalp energy
When used daily, Multi-Peptide Serum for Hair Density helps visibly improve hair density at the root for increased hair volume. The leave-in serum format absorbs easily with no greasy residue, and can help improve microcirculation to the scalp when massaged in with fingers.
All trademarks belong to their respective owners. REDENSYL™ is a trademark of Givaudan, Procapil™ is a trademark of Sederma Inc., CAPIXYL™ is a trademark of Lucas Meyer Cosmetics Canada Inc., BAICAPIL™ is a trademark of Provital, S.A., and AnaGain™ is a trademark of Mibelle Biochemistry. Neither DECIEM nor The Ordinary is affiliated with the trademark owners.
How to Use
How to Use
- Massage a few drops thoroughly into clean, dry scalp once daily, ideally at bedtime.
- This formula is a leave-in treatment.
- Do not wash hair or scalp after application.
- If irritation occurs, rinse off, cease use, and consult a physician.
- Use only as directed on unbroken skin.
- Patch testing prior to use is advised.
- Keep out of reach of children.
Product & Safety Guidance

Recycling Instructions
Before Recycling:
Empty the contents of the container. Remove cap, lid, dropper, pump, and other components and rinse the bottle/jar with water.
Packaging items with adhesive-based labels:
Contact your local recycling facility to ensure
recyclability via curbside recycling program.
Otherwise, dispose via our in-store recycling program.
Serum/Oil, Shampoo, Conditioner, Shower Gel, Lotion, Hand Soap Bottles:
#1 PETE & #2 HDPE and glass bottles are recyclable
through the majority of local curbside recycling programs.
# 5 PP bottles are usually recyclable through local
curbside recycling programs. Please contact your local recycling facility to
ensure recyclability.
Otherwise, dispose via our in-store recycling program.
Dropper Lids:
Dispose of via our in-store recycling program.
Disclaimer:
We work to provide our customers with accurate guidelines on packaging recyclability; however, please ensure your city or municipal program is consulted before recycling an item.
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Formulation Compatibility Tool
See if this product is compatible with other formulations from The Ordinary.