Peptide Skincare & BeautySkin science and ingredient guides

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Youth To The People Retinal + Niacinamide Youth Serum Versus The INKEY List Retinol Serum

Youth To The People Retinal + Niacinamide Youth Serum Versus The INKEY List Retinol Serum Detailed comparison of Youth To The People Retinal + Niacinamide Youth Serum versus The INKEY List Retinol Serum. This anti-aging serum is formulated around Niacinamide a

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Youth To The People Retinal + Niacinamide Youth Serum Versus The INKEY List Retinol Serum Detailed comparison of Youth To The People Retinal + Niacinamide Youth Serum versus The INKEY List Retinol Serum. This anti-aging serum is formulated around Niacinamide and Retinal to soften the look of wrinkles and refine skin texture. This anti-aging serum is formulated around Retinyl Acetate and Palmitoyl Tetrapeptide-7 to soften the look of wrinkles and refine skin texture. Water Butylene Glycol Triethylhexanoin Niacinamide Squalane Cyclodextrin Glycerin Hydrogenated Lecithin Polyglyceryl-10 Myristate Grifola Frondosa Fruiting Body Extract Rubus Chamaemorus Seed Oil Arginine Retinal Withania Somnifera Root Extract Helianthus Annuus Seed Oil Hordeum Vulgare Extract Ganoderma Lucidum Stem Extract Sodium Hyaluronate Crosspolymer Cucumis Sativus Seed Oil Lonicera Japonica Flower Extract Ceramide NP Ceramide AP Phytosphingosine Cholesterol Lentinus Edodes Mycelium Extract Lonicera Caprifolium Flower Extract Butyrospermum Parkii Oil Ceramide EOP Sodium Lauroyl Lactylate Acrylates/C10-30 Alkyl Acrylate Crosspolymer Capryloyl Glycerin/Sebacic Acid Copolymer Xanthan Gum Tocopherol Carbomer Hydrolyzed Glycosaminoglycans Sodium Hyaluronate Hyaluronic Acid Pentylene Glycol Hydrolyzed Sodium Hyaluronate Diheptyl Succinate Phenoxyethanol Ethylhexylglycerin Phytosterols Propanediol Benzyl Glycol Raspberry Ketone Water, Butylene Glycol, Triethylhexanoin, Niacinamide, Squalane, Cyclodextrin, Glycerin, Hydrogenated Lecithin, Polyglyceryl-10 Myristate, Grifola Frondosa Fruiting Body Extract, Rubus Chamaemorus Seed Oil, Arginine, Retinal, Withania Somnifera Root Extract, Helianthus Annuus Seed Oil, Hordeum Vulgare Extract, Ganoderma Lucidum Stem Extract, Sodium Hyaluronate Crosspolymer, Cucumis Sativus Seed Oil, Lonicera Japonica Flower Extract, Ceramide NP, Ceramide AP, Phytosphingosine, Cholesterol, Lentinus Edodes Mycelium Extract, Lonicera Caprifolium Flower Extract, Butyrospermum Parkii Oil, Ceramide EOP, Sodium Lauroyl Lactylate, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Capryloyl Glycerin/Sebacic Acid Copolymer, Xanthan Gum, Tocopherol, Carbomer, Hydrolyzed Glycosaminoglycans, Sodium Hyaluronate, Hyaluronic Acid, Pentylene Glycol, Hydrolyzed Sodium Hyaluronate, Diheptyl Succinate, Phenoxyethanol, Ethylhexylglycerin, Phytosterols, Propanediol, Benzyl Glycol, Raspberry Ketone Dicaprylyl Carbonate Retinyl Acetate Dimethicone Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer Caprylyl Glycol Phospholipids Glycine Soja Oil Polysorbate 60 Tocopheryl Acetate Glycolipids Sodium Hydroxide Sodium Phytate Sorbitan Isostearate Glycine Soja Sterols Tetrahexyldecyl Ascorbate Leuconostoc/Radish Root Ferment Filtrate Sodium Lactate Polysorbate 20 Palmitoyl Tetrapeptide-7 Palmitoyl Tripeptide-1 Water, Glycerin, Butylene Glycol, Propanediol, Dicaprylyl Carbonate, Retinyl Acetate, Dimethicone, Phenoxyethanol, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Caprylyl Glycol, Phospholipids, Squalane, Glycine Soja Oil, Carbomer, Polysorbate 60, Tocopheryl Acetate, Glycolipids, Sodium Hydroxide, Sodium Phytate, Sorbitan Isostearate, Glycine Soja Sterols, Tetrahexyldecyl Ascorbate, Leuconostoc/Radish Root Ferment Filtrate, Hyaluronic Acid, Sodium Lactate, Tocopherol, Polysorbate 20, Palmitoyl Tetrapeptide-7, Palmitoyl Tripeptide-1 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. 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. 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. Hyaluronic acid (HA) is a glycosaminoglycan (basically a long sugar chain) that your skin already makes on its own. In your skin, HA lives in the extracellular matrix and acts as the body's moisture reservoir. Topically, HA is a humectant that binds water and helps skin look more plump, smooth, and hydrated. The only catch is that HA isn't a single thing; it actually comes in a wide range of molecular weights (~50 - 2,000+ kDA) and size matters. Some clinical evidence links low molecular weight versions to improved wrinkle depth, elasticity, anti-inflammatory effects, and barrier repair. This is why the best HA serums blend the two sizes together so you get the best of both worlds. The majority of cosmetic HA is produced by bacterial fermentation, typically using Streptococcus or Bacillus strains. Typical use levels in skincare sit around 0.1-2%. A cli