Peptide Skincare & BeautySkin science and ingredient guides

Ingredient or product comparison

The Ordinary Multi-Peptide Lash And Brow Serum Versus IVY AÏA Eyelash Growth Serum

The Ordinary Multi-Peptide Lash And Brow Serum Versus IVY AÏA Eyelash Growth Serum Detailed comparison of The Ordinary Multi-Peptide Lash And Brow Serum versus IVY AÏA Eyelash Growth Serum. No concerns Water Glycerin Butylene Glycol Myristoyl Pentapeptide-17 B

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The Ordinary Multi-Peptide Lash And Brow Serum Versus IVY AÏA Eyelash Growth Serum Detailed comparison of The Ordinary Multi-Peptide Lash And Brow Serum versus IVY AÏA Eyelash Growth Serum. No concerns Water Glycerin Butylene Glycol Myristoyl Pentapeptide-17 Biotinoyl Tripeptide-1 Oligopeptide-2 Acetyl Tetrapeptide-3 Caffeine Panthenol Arginine Glycine Glycoproteins Larix Europaea Wood Extract Trifolium Pratense Flower Extract Camellia Sinensis Leaf Extract Dextran Maltodextrin Zinc Chloride Hydroxyethylcellulose Xanthan Gum Trisodium Ethylenediamine Disuccinate Polysorbate 20 Sodium Metabisulfite Caprylyl Glycol 1,2-Hexanediol Sodium Benzoate Benzoic Acid Ethylhexylglycerin Phenoxyethanol Chlorphenesin Water, Glycerin, Butylene Glycol, Myristoyl Pentapeptide-17, Biotinoyl Tripeptide-1, Oligopeptide-2, Acetyl Tetrapeptide-3, Caffeine, Panthenol, Arginine, Glycine, Glycoproteins, Larix Europaea Wood Extract, Trifolium Pratense Flower Extract, Camellia Sinensis Leaf Extract, Dextran, Maltodextrin, Zinc Chloride, Hydroxyethylcellulose, Xanthan Gum, Trisodium Ethylenediamine Disuccinate, Polysorbate 20, Sodium Metabisulfite, Caprylyl Glycol, 1,2-Hexanediol, Sodium Benzoate, Benzoic Acid, Ethylhexylglycerin, Phenoxyethanol, Chlorphenesin Propanediol Sodium Hyaluronate Carbomer Sodium Hydroxide Citric Acid Sodium Phytate Water, Propanediol, Glycerin, Panthenol, Biotinoyl Tripeptide-1, Sodium Hyaluronate, Carbomer, Sodium Hydroxide, Phenoxyethanol, Citric Acid, Sodium Phytate, Ethylhexylglycerin These ingredients are found in both products. Ingredients higher up in an ingredient list are typically present in a larger amount. Biotinoyl Tripeptide-1 is a lab-made molecule that combines two parts: biotin (vitamin B7) and Tripeptide-1. Together, they form a peptide that’s often used in hair and eyelash products. In-vitro studies show this ingredient helps hair bulb cells grow faster and product more structual proteins. This helps keep hair securely anchored in the follicle. A small human study using a mascara with 2% Biotinoyl Tripeptide-1 reported lashes that were about 17% longer and 19% thicker after one month. One study from 2025 compared topical spray vs. a combined tropical/oral treatment. The combination group saw greater increases in total hair count. While these early results are encouraging, most of the data comes from in-vitro experiments (in test tubes) or small, short-term trials. Biotinoyl Tripeptide-1 looks promising for supporting hair strength and growth but there’s not yet strong clinical evidence to confirm how well it works. Ethylhexylglycerin is created from glycerin. It is a multitasker ingredient that: The CIR Expert Panel found minimal skin absorption or sensitization of any kind in a safety assessment. Though this ingredient is considered well-tolerated, a small number of cases of allergic dermatitis have been published since 2002. Just be sure to patch test if you are unsure. Industry-reported use ranges from 8% in rinse-off products and 2% in leave-on formulations. Glycerin (or glycerol) is a compound naturally found in your skin. It's a powerhouse humectant that pulls water into the stratum corneum. Topically, glycerin does several things at once: Your skin makes glycerin on its own (mostly from sebaceous oil breakdown) and shuttles it to your outermost layer of skin, or your epidermis, via aquaporin-3. Aquaporin-3 is a transporter that is essential for normal skin hydration, elasticity, and repair. Interestingly, mice lacking in AQP3 have dry and less elastic skin that can be fully corrected with glycerin. This ingredient is non-irritating, plays well with almost every ingredient, and works across all skin types. Typical use is anywhere between 3-10% but can go up to 79% in some leave-on products. Just know very high concentrations (>40%) can feel tacky in low humidity. Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine. Panthenol is a common ingredient that helps hydrate and soothe the skin. It is found naturally in our skin and hair. There are two forms of panthenol: D and L. D-panthenol is also known as dexpanthenol. Most cosmetics use dexpanthenol or a mixture of D and L-panthenol. Panthenol is famous due to its ability to go deeper into the skin's layers. Using this ingredient has numerous pros (and no cons): Like hyaluronic acid, panthenol is a humectant. Humectants are able to bind and hold large amounts of water to keep skin hydrated. This ingredient work