Peptide Skincare & BeautySkin science and ingredient guides

Ingredient or product comparison

Medik8 Liquid Peptides Versus Dr. Dennis Gross Skincare DermInfusions™ Plump + Repair Lip Treatment

Medik8 Liquid Peptides Versus Dr. Dennis Gross Skincare DermInfusions™ Plump + Repair Lip Treatment Detailed comparison of Medik8 Liquid Peptides versus Dr. Dennis Gross Skincare DermInfusions™ Plump + Repair Lip Treatment. This anti-aging serum is formulated

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Medik8 Liquid Peptides Versus Dr. Dennis Gross Skincare DermInfusions™ Plump + Repair Lip Treatment Detailed comparison of Medik8 Liquid Peptides versus Dr. Dennis Gross Skincare DermInfusions™ Plump + Repair Lip Treatment. This anti-aging serum is formulated around Carnosine and Palmitoyl Tripeptide-5 to soften the look of wrinkles and refine skin texture. This barrier-repair lip moisturizer is formulated around Ectoin and Palmitoyl Tripeptide-38 to strengthen the lip barrier and hydrate lips. 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 Hydrogenated Polyisobutene Jojoba Esters Cocos Nucifera Oil Squalane Copernicia Cerifera Wax Ethylene/Propylene/Styrene Copolymer Benzyl Nicotinate Ectoin Hydrolyzed Sodium Hyaluronate Sodium Acetylated Hyaluronate Portulaca Pilosa Extract Silybum Marianum Fruit Extract Centella Asiatica Meristem Cell Culture Trehalose Bisabolol Citrullus Lanatus Fruit Extract Pyrus Malus Fruit Extract Persea Gratissima Oil Triisostearin Glucomannan Ethylhexyl Palmitate Tribehenin Cetearyl Ethylhexanoate Sucrose Cocoate Trihydroxystearin Dimer Dilinoleyl Dimer Dilinoleate Sorbitan Isostearate Butylene/Ethylene/Styrene Copolymer Leuconostoc/Radish Root Ferment Filtrate Tocopherol Lactic Acid Hydrogenated Polyisobutene, Jojoba Esters, Cocos Nucifera Oil, Squalane, Copernicia Cerifera Wax, Ethylene/Propylene/Styrene Copolymer, Benzyl Nicotinate, Ectoin, Sodium Hyaluronate, Hydrolyzed Sodium Hyaluronate, Palmitoyl Tripeptide-38, Palmitoyl Tripeptide-1, Sodium Acetylated Hyaluronate, Portulaca Pilosa Extract, Silybum Marianum Fruit Extract, Centella Asiatica Meristem Cell Culture, Trehalose, Bisabolol, Citrullus Lanatus Fruit Extract, Pyrus Malus Fruit Extract, Persea Gratissima Oil, Triisostearin, Glycerin, Glucomannan, Ethylhexyl Palmitate, Tribehenin, Cetearyl Ethylhexanoate, Sucrose Cocoate, Trihydroxystearin, Dimer Dilinoleyl Dimer Dilinoleate, Xanthan Gum, Sorbitan Isostearate, Butylene/Ethylene/Styrene Copolymer, Leuconostoc/Radish Root Ferment Filtrate, Tocopherol, Water, Lactic Acid, Citric Acid, Phenoxyethanol, Sodium Benzoate, Potassium Sorbate These ingredients are found in both products. Ingredients higher up in an ingredient list are typically present in a larger amount. 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. 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. Palmitoyl Tripeptide-1 (aka Pal-GHK) is a synthetic signal peptide made of three amino acids attached to palmitic acid. That fatty acid attachment is the key: it boosts the peptide's ability to penetrate the skin barrier. This puts it closer to the dermal cells where it can actually make a difference. Once there, it acts as a matrikine, a signaling peptide that prompts fibroblasts to produce more collagen, fibronectin, and hyaluronic acid. In vitro studies show it