Compare peptide scalp serums for fuller-looking hair

Compare the three scalp serums

US one-time offers checked November 12, 2026. Prices and stock can change.
Product and source	Price and size	Listed peptides	Formula differences
The Ordinary Multi-Peptide Serum for Hair Density	$24 for 60 mL · $0.40/mL	Biotinoyl Tripeptide-1 and Acetyl Tetrapeptide-3	Water-based leave-in for a clean, dry scalp. No fragrance is listed in the checked formula.
Verb Density Peptide Hair Serum, 1 fl oz	$22 for 1 US fl oz · about $0.74/mL	Biotinoyl Tripeptide-1	Lower bottle price in the size checked. The label lists fragrance and niacinamide.
Briogeo MegaStrength+ Peptide Density Serum	$57 for 45 mL · $1.27/mL	Copper Tripeptide-34	A different peptide from Copper Tripeptide-1. The formula also lists caffeine, niacinamide and biotin.

How these three made the shortlist

Each product is sold as a leave-in scalp serum for fuller-looking hair and lists at least one named peptide in a published ingredient list. This is a small set with verified US offers and identifiable sizes. Compare the exact size you plan to buy. Unit prices use the listed volume, with the Verb ounce size converted to mL.

What do the comparisons establish?

The prices and labels let you compare shopping preferences. They do not establish how much a serum changes hair appearance or which serum performs better. FDA distinguishes cosmetic appearance claims from claims to restore hair growth.

US regulatorFDA · Cosmetic and drug claims

How do I check the bottle size?

Briogeo supplies the $57 one-time offer and the formula. The matching retailer listing supplies the 45 mL size. Stock can differ by store and change after the check.

US retailer · package sizeSephora Briogeo Density Serum listing

The Ordinary Hair Density Serum breakdown