Peptide Skincare & BeautySkin science and ingredient guides

Ingredient or product comparison

Mary Kay TimeWise Repair Volu-Firm® Advanced Lifting Serum Versus Peter Thomas Roth Peptide 21 Wrinkle Resist Serum

Mary Kay TimeWise Repair Volu-Firm® Advanced Lifting Serum Versus Peter Thomas Roth Peptide 21 Wrinkle Resist Serum Detailed comparison of Mary Kay TimeWise Repair Volu-Firm® Advanced Lifting Serum versus Peter Thomas Roth Peptide 21 Wrinkle Resist Serum. This

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Mary Kay TimeWise Repair Volu-Firm® Advanced Lifting Serum Versus Peter Thomas Roth Peptide 21 Wrinkle Resist Serum Detailed comparison of Mary Kay TimeWise Repair Volu-Firm® Advanced Lifting Serum versus Peter Thomas Roth Peptide 21 Wrinkle Resist Serum. This anti-aging serum is formulated around Tripeptide-1 to soften the look of wrinkles. This anti-aging serum is formulated around Tripeptide-10 Citrulline and Acetyl Octapeptide-3 to soften the look of wrinkles. Cyclopentasiloxane Water Silica Glycerin PEG-10 Dimethicone Dimethicone Polymethylsilsesquioxane Polysilicone-11 Pentylene Glycol Hdi/Trimethylol Hexyllactone Crosspolymer Phenoxyethanol Butylene Glycol Ammonium Acryloyldimethyltaurate/Vp Copolymer Vp/Va Copolymer Polysorbate 40 Sorbitol Mica Caprylyl Glycol Chlorphenesin Alpinia Galanga Leaf Extract Menthyl Lactate Hydroxypropyl Cyclodextrin Sodium Chloride Secale Cereale Seed Extract Centella Asiatica Meristem Cell Culture Cyclohexasiloxane Disodium EDTA Triethanolamine Dihydroxy Methylchromone Pisum Sativum Extract Schisandra Chinensis Fruit Extract Xanthan Gum Caprylic Acid Caprylic/Capric Triglyceride Sodium Citrate Tin Oxide Iodopropynyl Butylcarbamate Cyclodextrin Maltodextrin Alteromonas Ferment Filtrate Tocopherol Dextran Tripeptide-1 CI 77891 Cyclopentasiloxane, Water, Silica, Glycerin, PEG-10 Dimethicone, Dimethicone, Polymethylsilsesquioxane, Polysilicone-11, Pentylene Glycol, Hdi/Trimethylol Hexyllactone Crosspolymer, Phenoxyethanol, Butylene Glycol, Ammonium Acryloyldimethyltaurate/Vp Copolymer, Vp/Va Copolymer, Polysorbate 40, Sorbitol, Mica, Caprylyl Glycol, Chlorphenesin, Alpinia Galanga Leaf Extract, Menthyl Lactate, Hydroxypropyl Cyclodextrin, Sodium Chloride, Secale Cereale Seed Extract, Centella Asiatica Meristem Cell Culture, Cyclohexasiloxane, Disodium EDTA, Triethanolamine, Dihydroxy Methylchromone, Pisum Sativum Extract, Schisandra Chinensis Fruit Extract, Xanthan Gum, Caprylic Acid, Caprylic/Capric Triglyceride, Sodium Citrate, Tin Oxide, Iodopropynyl Butylcarbamate, Cyclodextrin, Maltodextrin, Alteromonas Ferment Filtrate, Tocopherol, Dextran, Tripeptide-1, CI 77891 Rosa Centifolia Flower Water Isopropyl Myristate Squalane Mannitol Natto Gum Tripeptide-10 Citrulline Acetyl Octapeptide-3 Palmitoyl Hexapeptide-12 Acetyl Tetrapeptide-11 Acetyl Hexapeptide-8 Acetyl Hexapeptide-1 Palmitoyl Oligopeptide Acetyl Tetrapeptide-9 Acetyl Tetrapeptide-2 Palmitoyl Tetrapeptide-7 Hexapeptide-11 Dipeptide Diaminobutyroyl Benzylamide Diacetate Palmitoyl Tripeptide-5 Trifluoroacetyl Tripeptide-2 Palmitoyl Tripeptide-1 Sodium Polyglutamate Sodium Hyaluronate Tocopheryl Acetate Retinyl Palmitate Ascorbic Acid Hydrolyzed Soy Protein Hydrolyzed Wheat Protein Lecithin Pseudoalteromonas Ferment Extract Acrylates Copolymer Magnesium Chloride Polysorbate 20 Dimethyl Isosorbide Acrylates/C10-30 Alkyl Acrylate Crosspolymer Leuconostoc/Radish Root Ferment Filtrate PEG-8 Dimethicone Disodium Phosphate Carbomer Sodium Lactate Tetradecyl Aminobutyroylvalylaminobutyric Urea Trifluoroacetate Sodium Phosphate Octyldodecanol Sodium Propoxyhydroxypropyl Thiosulfate Silica Sodium Hydroxide Potassium Sorbate Sodium Benzoate Water, Glycerin, Rosa Centifolia Flower Water, Isopropyl Myristate, Squalane, Mannitol, Butylene Glycol, Natto Gum, Tripeptide-10 Citrulline, Acetyl Octapeptide-3, Palmitoyl Hexapeptide-12, Acetyl Tetrapeptide-11, Acetyl Hexapeptide-8, Acetyl Hexapeptide-1, Palmitoyl Oligopeptide, Acetyl These ingredients are found in both products. Ingredients higher up in an ingredient list are typically present in a larger amount. 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). Dextran is a sugar (polysaccharide) with skin hydrating properties. Fun fact: Louis Pasteur first discovered this ingredient as a microbial product in wine. 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. Phenoxyethanol is one of the most widely used preservatives in skincare (and for good reason!). It has a large spectrum of antimicrobial activity and especially effective bacteria, yeast, and mold while only having a weak effect on your skin's natural microbiome. On a cellular level, it disrupts the cell membranes of microbes by poking holes that make the cell leak. This shuts down the chemical reactions the microbe needs to make energy so it can no longer survive. Another perk of this ingredient is that it stays functional across a wide pH range (3-10). You'll often see it paired with boosters like Ethylhexylglycerin; one study showed that a 1:9 ratio of Ethylhexylglycerin to Phenoxyethanol damages bacterial membranes as effectively as doubling the Phenoxyethanol concentration on its own. Typical use concentrations range from 0.3-1% depending on the formula, and this ingredient is capped at 1% int the EU. Safety-wise, the fear mongering does not hold up to the evidence. The EU's Scientific Committee on Consumer Safety and FDA consider it safe as a