The Ordinary
Multi-Peptide Serum for Hair Density
"A science-forward scalp serum at an accessible price. Targets hair density with peptides and caffeine. Requires patience—results take months."
Hair Compatibility
Curl Pattern
Strand Thickness
Porosity
Performance
- Hold Level
- No Hold
- Weight
- Very Light
- Finish
- Soft, No Cast
- Buildup Risk
- Low
What's Inside
Biotinoyl Tripeptide-1
Peptide that supports hair anchoring
Caffeine
Stimulates scalp circulation
Pea Sprout Extract (AnaGain)
Targets follicles to stimulate growth
Redensyl
Patented complex for hair density
View Full Ingredients List
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
Analyze these ingredients with our Ingredient Checker tool.
How to Use
Best as: Finisher
Alternatives to Consider
Overview
The Ordinary Multi-Peptide Serum for Hair Density brings the brand’s science-forward, accessible approach to hair care. This scalp serum combines peptides, caffeine, and Redensyl to target hair density at the follicular level. It’s not a styling product—it’s a treatment that requires consistent use over months to show results.
Key Ingredients Breakdown
- Biotinoyl Tripeptide-1 - A peptide that supports hair anchoring at the follicle level.
- Caffeine - Stimulates scalp circulation, potentially improving nutrient delivery to follicles.
- Pea Sprout Extract (AnaGain) - Targets follicles to stimulate the hair growth cycle.
- Redensyl - A patented complex containing DHQG, EGCG2, glycine, and zinc, designed to support hair density.
What We Love
- Budget-friendly - Accessible science-backed ingredients
- Fragrance-free - No added scent to irritate scalp
- Lightweight - Won’t weigh down hair or look greasy
- Easy application - Dropper makes targeting scalp simple
- CGM-friendly - Clean formula
- Vegan - Ethical choice
What Could Be Better
- Slow results - Takes 3-6 months to see changes
- Not a styling product - Won’t improve curl definition
- Daily commitment - Requires consistent application
- Individual results vary - Not everyone sees improvement
How to Use
Daily Application
- Apply directly to scalp, not hair lengths
- Use the dropper to target areas of concern
- Massage gently for 1-2 minutes
- Leave in—do not rinse
- Apply to dry or damp scalp (before bed works well)
Consistency Is Key
Use daily for at least 3 months before evaluating results. Hair growth cycles are slow—patience is essential.
Pro Tip
Take photos monthly to track progress. Changes are often too gradual to notice day-to-day.
The Verdict
The Ordinary Multi-Peptide Serum for Hair Density sits in the budget category and offers science-backed ingredients at an accessible price. It’s not a miracle product—nothing is—but for those willing to commit to consistent use over months, the ingredient profile is solid. Manage expectations and give it time.
Our Rating: 4/5