Tirtir Niacinamide 20% Serum Versus Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide

Tirtir Niacinamide 20% Serum Versus Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide Detailed comparison of Tirtir Niacinamide 20% Serum versus Kiehl's Micro-Dose Anti-Aging Retinol Serum with Ceramides and Peptide. This brightening serum is formulated around Niacinamide and Alpha-Arbutin to fade the look of dark spots and refine the look of pores. This anti-aging serum is formulated around Niacinamide and Ceramide NP to soften the look of wrinkles and refine skin texture. Water Niacinamide Glycerin Butylene Glycol Propanediol Alpha-Arbutin 1,2-Hexanediol Hydroxyacetophenone Acrylates/C10-30 Alkyl Acrylate Crosspolymer Tromethamine Glycereth-25 PCA Isostearate Ethylhexylglycerin Caprylic/Capric Triglyceride Macadamia Ternifolia Seed Oil Zea Mays Kernel Extract Disodium EDTA Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer Hydrogenated Lecithin Retinol Hyaluronic Acid Hydrolyzed Hyaluronic Acid Sodium Hyaluronate Brassica Campestris Sterols Cholesterol Polyglyceryl-10 Laurate Phytosteryl/Behenyl/Octyldodecyl Lauroyl Glutamate Aluminum/Magnesium Hydroxide Stearate Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate Polysorbate 60 Sorbitan Isostearate Fructan Potassium Cetyl Phosphate Glucose Chitosan Tris(Tetramethylhydroxypiperidinol)Citrate Glutathione Zinc PCA Water, Niacinamide, Glycerin, Butylene Glycol, Propanediol, Alpha-Arbutin, 1,2-Hexanediol, Hydroxyacetophenone, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Tromethamine, Glycereth-25 PCA Isostearate, Ethylhexylglycerin, Caprylic/Capric Triglyceride, Macadamia Ternifolia Seed Oil, Zea Mays Kernel Extract, Disodium EDTA, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Hydrogenated Lecithin, Retinol, Hyaluronic Acid, Hydrolyzed Hyaluronic Acid, Sodium Hyaluronate, Brassica Campestris Sterols, Cholesterol, Polyglyceryl-10 Laurate, Phytosteryl/Behenyl/Octyldodecyl Lauroyl Glutamate, Aluminum/Magnesium Hydroxide Stearate, Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate, Polysorbate 60, Sorbitan Isostearate, Fructan, Potassium Cetyl Phosphate, Glucose, Chitosan, Tris(Tetramethylhydroxypiperidinol)Citrate, Glutathione, Zinc PCA Pentylene Glycol Cetyl Alcohol Isohexadecane Isononyl Isononanoate Diisopropyl Sebacate 2-Oleamido-1,3-Octadecanediol 4-T-Butylcyclohexanol Acetyl Dipeptide-1 Cetyl Ester Adenosine Ceramide NP Hydroxypalmitoyl Sphinganine Lauroyl Lysine Octyldodecanol Sodium Chloride Sodium Hydroxide Trisodium Ethylenediamine Disuccinate Tocopherol Dicaprylyl Ether Ammonium Polyacryloyldimethyl Taurate Behenyl Alcohol Caprylyl Glycol Carbomer Cetearyl Alcohol Cetearyl Glucoside Glycine Soja Oil Helianthus Annuus Seed Oil Hydroxyethylcellulose Lecithin Phenethyl Alcohol Poloxamer 188 Polycaprolactone Sorbitan Laurate Steareth-100 CI 40800 Chlorphenesin Phenoxyethanol Water, Glycerin, Butylene Glycol, Pentylene Glycol, Niacinamide, Cetyl Alcohol, Isohexadecane, Isononyl Isononanoate, Diisopropyl Sebacate, 2-Oleamido-1,3-Octadecanediol, 4-T-Butylcyclohexanol, Acetyl Dipeptide-1 Cetyl Ester, Adenosine, Ceramide NP, Hydroxypalmitoyl Sphinganine, Lauroyl Lysine, Octyldodecanol, Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate, Sodium Chloride, Sodium Hyaluronate, Sodium Hydroxide, Trisodium Ethylenediamine Disuccinate, Retinol, Tocopherol, Dicaprylyl Ether, Ammonium Polyacryloyldimethyl Taurate, Behenyl Alcohol, Caprylyl Glycol, Carbomer, Cetearyl Alcohol, Cetearyl Glucoside, Glycine Soja Oil, Helianthus Annuus Seed Be the first to review 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. 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. Niacinamide is a multitasking form of vitamin B3 that strengthens the skin barrier, reduces pores and dark spots, regulates oil, and improves signs of aging. And the best part? It's gentle and well-tolerated by most skin types, including sensitive and reactive skin. You might have heard of "niacin flush", or the reddening of skin that causes itchiness. Niacinamide has not been found to cause this. In very rare cases, some individuals may not be able to tolerate niacinamide at all or experience an allergic reaction to it. If you are experiencing flaking, irritation, and dryness with this ingredient, be sure to double check all your products as this ingredient can be found in all categories of skincare. When incorporating niacinamide into your routine, look out for concentration amounts. Typically, 5% niacinamide provides benefits such as fading dark spots. However, if you have sensitive skin, it is better to begin with a smaller concentration. When you apply niacinamide to your skin, your body converts it into nicotinamide adenine dinucleotide (NAD). NAD is an essential coenzyme that is already found in your cells as "fuel" and powers countless biological processes. In your skin, NAD helps repair cell damage, produce new healthy cells, support collagen production, strengthen the skin barrier, and fight environmental stressors (like UV and pollution). Our natural NAD levels start to decline with age, leading to slower skin repair, visible aging, and a weaker skin barrier. By providing your skin niacinamide, you're recharging your skin's NAD levels. This lead