Peptide Skincare & BeautySkin science and ingredient guides

Product and ingredient reference

Mary & May 6 Peptide Complex Serum

Mary & May 6 Peptide Complex Serum Ingredients in Mary & May 6 Peptide Complex Serum explained: benefits, concerns, and detailed analysis of 17 ingredients including Water, Glycereth-26, and 1,2-Hexanediol A serum with 17 ingredients, including peptides. This

Mary & May 6 Peptide Complex Serum Ingredients in Mary & May 6 Peptide Complex Serum explained: benefits, concerns, and detailed analysis of 17 ingredients including Water, Glycereth-26, and 1,2-Hexanediol A serum with 17 ingredients, including peptides. This anti-aging serum is formulated around Copper Tripeptide-1 and Palmitoyl Pentapeptide-4 to soften the look of wrinkles and refine skin texture. We independently verify ingredients, backed by peer-reviewed research. Suggest an update. 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 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 Water. It's the most common cosmetic ingredient of all. You'll usually see it at the top of ingredient lists, meaning that it makes up the largest part of the product. So why is it so popular? Water most often acts as a solvent - this means that it helps dissolve other ingredients into the formulation. You'll also recognize water as that liquid we all need to stay alive. If you see this, drink a glass of water. Remember to stay hydrated! Glycereth-26 is a synthetic ingredient and polyethylene glycol ether of Glycerin. Glycerin is already naturally found in your skin and helps keep your skin moisturized. It is a humectant and helps add texture to products. It can make your product thicker. As a humectant, it helps draw moisture from the air to your skin. This helps your skin stay hydrated. 1,2-Hexanediol is a synthetic liquid and another multi-functional powerhouse. It is a: Humectant, drawing moisture into the skin Emollient, helping to soften skin Solvent, dispersing and stabilizing formulas Preservative booster, enhancing the antimicrobial activity of other preservatives 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. 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. 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 si Search reviews by skin type, ingredient, or keyword. Mary & May is a Korean brand We're dedicated to providing you with the most up-to-date and science-backed ingredient info out there. The data we've presented on this page has been verified by a member of the SkinSort Team. · Updated August 5, 2026 • Added by Yasmin

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