Peptide Skincare & BeautySkin science and ingredient guides

Ingredient or product comparison

The Ordinary Multi Peptides + Copper Peptide 1% Versus Mary & May 6 Peptide Complex Serum

The Ordinary Multi Peptides + Copper Peptide 1% Versus Mary & May 6 Peptide Complex Serum Detailed comparison of The Ordinary Multi Peptides + Copper Peptide 1% versus Mary & May 6 Peptide Complex Serum. This anti-aging serum is formulated around Lactococcus F

This source-based comparison does not add ratings or recommend a winner.

The Ordinary Multi Peptides + Copper Peptide 1% Versus Mary & May 6 Peptide Complex Serum Detailed comparison of The Ordinary Multi Peptides + Copper Peptide 1% versus Mary & May 6 Peptide Complex Serum. This anti-aging serum is formulated around Lactococcus Ferment Lysate and Copper Tripeptide-1 to soften the look of wrinkles and refine skin texture. This anti-aging serum is formulated around Copper Tripeptide-1 and Palmitoyl Pentapeptide-4 to soften the look of wrinkles and refine skin texture. Water Glycerin Lactococcus Ferment Lysate Copper Tripeptide-1 Acetyl Hexapeptide-8 Pentapeptide-18 Palmitoyl Tripeptide-1 Palmitoyl Tetrapeptide-7 Palmitoyl Tripeptide-38 Dipeptide Diaminobutyroyl Benzylamide Diacetate Acetylarginyltryptophyl Diphenylglycine Sodium Hyaluronate Crosspolymer Sodium Hyaluronate Allantoin Glycine Alanine Serine Valine Isoleucine Proline Threonine Histidine Phenylalanine Arginine Aspartic Acid Trehalose Fructose Glucose Maltose Urea Sodium PCA PCA Sodium Lactate Citric Acid Hydroxypropyl Cyclodextrin Sodium Chloride Sodium Hydroxide Butylene Glycol Pentylene Glycol Acacia Senegal Gum Xanthan Gum Carbomer Polysorbate 20 Dimethyl Isosorbide Sodium Benzoate Caprylyl Glycol Ethylhexylglycerin Phenoxyethanol Chlorphenesin Water, Glycerin, Lactococcus Ferment Lysate, Copper Tripeptide-1, Acetyl Hexapeptide-8, Pentapeptide-18, Palmitoyl Tripeptide-1, Palmitoyl Tetrapeptide-7, Palmitoyl Tripeptide-38, Dipeptide Diaminobutyroyl Benzylamide Diacetate, Acetylarginyltryptophyl Diphenylglycine, Sodium Hyaluronate Crosspolymer, Sodium Hyaluronate, Allantoin, Glycine, Alanine, Serine, Valine, Isoleucine, Proline, Threonine, Histidine, Phenylalanine, Arginine, Aspartic Acid, Trehalose, Fructose, Glucose, Maltose, Urea, Sodium PCA, PCA, Sodium Lactate, Citric Acid, Hydroxypropyl Cyclodextrin, Sodium Chloride, Sodium Hydroxide, Butylene Glycol, Pentylene Glycol, Acacia Senegal Gum, Xanthan Gum, Carbomer, Polysorbate 20, Dimethyl Isosorbide, Sodium Benzoate, Caprylyl Glycol, Ethylhexylglycerin, Phenoxyethanol, Chlorphenesin Glycereth-26 1,2-Hexanediol Polyglyceryl-10 Laurate Adenosine Hexapeptide-11 Hexapeptide-9 Palmitoyl Pentapeptide-4 Tripeptide-1 Water, Glycereth-26, 1,2-Hexanediol, Butylene Glycol, Glycerin, Arginine, Carbomer, Ethylhexylglycerin, Polyglyceryl-10 Laurate, Adenosine, Caprylyl Glycol, Copper Tripeptide-1, Hexapeptide-11, Hexapeptide-9, Palmitoyl Pentapeptide-4, Palmitoyl Tripeptide-1, Tripeptide-1 These ingredients are found in both products. Ingredients higher up in an ingredient list are typically present in a larger amount. Arginine is a semi-essential amino acid. This just means our bodies can product a bit on its own, but sometimes needs a little boost from food sources. It is a part of your skin's natural moisturizing factor (NMF), or the water-loving molecules in your outermost layer of skin (stratum corneum) that keeps everything hydrated and happy. Here's an interesting thing about Arginine: your skin converts it into urea through the Krebs-Henseleit urea cycle. Urea is one of the most effective humectants your skin naturally produces. A clinical study showed applying 2.5% arginine hydrochloride to atopic dermatitis skin showed significant urea levels in the stratum corneum and improved moisture in just four weeks. Arginine is also a precursor to nitric oxide; nitric oxide improves microcirculation and supports wound healing and collagen synthesis. One study found that an amino acid complex containing Arginine reduced skin irritation, improved hydration, and accelerated skin repair in clinical / in-vivo studies. Arginine itself is an amino acid and not a fatty acid, oil, or ester. On its own, it's not a direct food source for Malassezia, or the yeast that causes fungal acne. Butylene Glycol (or BG) is used within cosmetic products for a few different reasons: Overall, Butylene Glycol is a safe and well-rounded ingredient that works well with other ingredients. Though this ingredient works well with most skin types, some people with sensitive skin may experience a reaction such as allergic rashes, closed comedones, or itchiness. Caprylyl Glycol is a humectant, skin conditioner, emollient, and preservative booster derived from either caprylic acid or synthetically created. Typical use levels vary from 0.3-1% as a preservative booster and go up to 2% to condition skin. Because it is not a free-fatty acid, this ingredient is fungal acne safe (there's nothing for Malassezia to feed on). Carbomer is a synthetic thickening and gelling agent. It's basically the ingredient that gives a lot of serums, gels, creams, and sunscreens their smooth, non-sticky texture. Although legally permitted at very high levels, carbomers are normally used at concentrations below 1%. It also needs to be neutralized to actually thicken, and because it is a large molecule, it doesn't really penetrate the skin barrier. Allergy-wise, the risk is very low. Clinical studies show carbomers have low potential for skin irritation/sensitization even at concentrations up to 100%. A 2024 UK study patch-tested 1,302 patients and found true allergy to the parent group of carbomer to be rare with no confirmed relevant reactions. Copper Tripeptide-1 (GHK-Cu) is a skin repairing ingredient known for its ability to boost collagen, improve firmness, and support skin regeneration. It is a complex made up of a naturally occurring peptide (glycine-histidine-lysine) and copper, an