Peptide Skincare & BeautySkin science and ingredient guides

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Medik8 Liquid Peptides Versus Medik8 Advanced Pro-Collagen+ Peptide Cream

Medik8 Liquid Peptides Versus Medik8 Advanced Pro-Collagen+ Peptide Cream Detailed comparison of Medik8 Liquid Peptides versus Medik8 Advanced Pro-Collagen+ Peptide Cream. This anti-aging serum is formulated around Carnosine and Palmitoyl Tripeptide-5 to softe

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Medik8 Liquid Peptides Versus Medik8 Advanced Pro-Collagen+ Peptide Cream Detailed comparison of Medik8 Liquid Peptides versus Medik8 Advanced Pro-Collagen+ Peptide Cream. This anti-aging serum is formulated around Carnosine and Palmitoyl Tripeptide-5 to soften the look of wrinkles and refine skin texture. This anti-aging moisturizer is formulated around Carnosine and Squalane to soften the look of wrinkles and strengthen the skin barrier. Water Glycerin Butylene Glycol Inulin Sodium Hyaluronate Panthenol Alpha-Glucan Oligosaccharide Carnosine Carbomer Polysorbate 20 Caprylyl Glycol Phenoxyethanol Hydroxypropyl Cyclodextrin Dunaliella Salina Extract Ethylhexylglycerin Citric Acid Palmitoyl Tripeptide-5 Sodium Benzoate Acetyl Hexapeptide-8 Tetrapeptide-21 Pentapeptide-18 Palmitoyl Tripeptide-1 Pantolactone Palmitoyl Tripeptide-38 Palmitoyl Tetrapeptide-7 Glyceryl Caprylate Lactic Acid/Glycolic Acid Copolymer Polyvinyl Alcohol Phenylpropanol Copper Palmitoyl Heptapeptide-14 Heptapeptide-15 Palmitate Potassium Sorbate Xanthan Gum Water, Glycerin, Butylene Glycol, Inulin, Sodium Hyaluronate, Panthenol, Alpha-Glucan Oligosaccharide, Carnosine, Carbomer, Polysorbate 20, Caprylyl Glycol, Phenoxyethanol, Hydroxypropyl Cyclodextrin, Dunaliella Salina Extract, Ethylhexylglycerin, Citric Acid, Palmitoyl Tripeptide-5, Sodium Benzoate, Acetyl Hexapeptide-8, Tetrapeptide-21, Pentapeptide-18, Palmitoyl Tripeptide-1, Pantolactone, Palmitoyl Tripeptide-38, Palmitoyl Tetrapeptide-7, Glyceryl Caprylate, Lactic Acid/Glycolic Acid Copolymer, Polyvinyl Alcohol, Phenylpropanol, Copper Palmitoyl Heptapeptide-14, Heptapeptide-15 Palmitate, Potassium Sorbate, Xanthan Gum Squalane Caprylic/Capric Triglyceride Lavandula Angustifolia Flower Water Dimethicone Stearic Acid Phytosteryl Oleate C12-16 Alcohols Sodium Acrylate/Sodium Acryloyldimethyl Taurate Copolymer Maltodextrin Rosmarinus Officinalis Water Cetearyl Alcohol Butyrospermum Parkii Butter Ceramide NP Linoleic Acid Cetearyl Olivate Palmitic Acid Behenyl Alcohol Tocopheryl Acetate Collagen Amino Acids Micrococcus Lysate Hydrogenated Lecithin Oligopeptide-1 Sorbitan Olivate Helianthus Annuus Sprout Extract Sodium Gluconate Sodium Polyglutamate Acetyl Glucosamine Hydroxyacetophenone Phytosterols Sodium Lauroyl Lactylate Lecithin Cholesterol Ceteareth-25 Ceramide AP Phytosphingosine Cetyl Alcohol Behenic Acid Ceramide Ns Ceramide EOP Ceramide Eos Caprooyl Phytosphingosine Caprooyl Sphingosine Ascorbyl Palmitate Tocopherol Glyceryl Stearate Glyceryl Oleate Water, Squalane, Caprylic/Capric Triglyceride, Lavandula Angustifolia Flower Water, Glycerin, Dimethicone, Stearic Acid, Phytosteryl Oleate, C12-16 Alcohols, Sodium Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Maltodextrin, Carnosine, Rosmarinus Officinalis Water, Cetearyl Alcohol, Butyrospermum Parkii Butter, Ceramide NP, Linoleic Acid, Cetearyl Olivate, Palmitic Acid, Behenyl Alcohol, Tocopheryl Acetate, Collagen Amino Acids, Micrococcus Lysate, Hydrogenated Lecithin, Oligopeptide-1, Sorbitan Olivate, Helianthus Annuus Sprout Extract, Xanthan Gum, Citric Acid, Sodium Hyaluronate, Ethylhexylglycerin, Sodium Gluconate, Sodium Polyglutamate, Acetyl Glucosamine, Hydroxyacetophenone, Phytosterols, Sodium Lauroyl Lactylate, Lecithin, Cholesterol, Ceteareth-25, Ceramide AP, Phytosphingosine, Carbomer, Cetyl Alcohol, Behenic Acid, Ceramide Ns, Ceramide EOP, Ceramide Eos, Caprooyl Phytosphingosine, Caproo These ingredients are found in both products. Ingredients higher up in an ingredient list are typically present in a larger amount. 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. Carnosine is a dipeptide made from two amino acids. This ingredient helps: Glycation is the process of sugars binding to and damaging proteins. Too much sugar in our skin can lead to damaged collagen, contributing to factors of aging. Carnosine is water-soluble and is not able to travel deeper layers of skin. This leads to some doubt about whether it can boost collagen in skin, since collagen is located in the deeper layers of skin. Fun fact: Carnosine can be naturally found in our muscles and brain. Citric Acid is an alpha hydroxy acid (AHA) naturally found in citrus fruits like oranges, lemons, and limes. Like other AHAs, citric acid can exfoliate skin by breaking down the bonds that hold dead skin cells together. This helps reveal smoother and brighter skin underneath. However, this exfoliating effect only happens at high concentrations (20%) which can be hard to find in cosmetic products. Due to this, citric acid is usually included in small amounts as a pH adjuster. This helps keep products slightly more acidic and compatible with skin's natural pH. In skincare formulas, citric acid can: While it can provide some skin benefits, research shows lactic acid and glycolic acid are generally more effective and less irritating exfoliants. Most citric acid used in skincare today is made by fermenting sugars (usually from molasses). This synthetic version is identical to the natural citrus form but easier to stabilize and use in formulations. Rosacea skin has a lower threshold for acids generally, with 62.5% of rosacea subjects in one study reacting to lactic acid in a sting test. This is why we mark citric acid as a potential rosacea trigger. However, this ingredient shows up as a pH adjuster or chelator at roughly 0.1-1% in many products. These low levels are unlikely to be an issue for rosacea skin and becomes a potential trigger at exfoliating concentrations (20%). Because everybody's skin is unique, we recommend a patch test if you are unsure. 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 safe