The Ordinary Niacinamide 10% + Zinc 1% Versus Dr Sam’s Flawless Nightly Serum

The Ordinary Niacinamide 10% + Zinc 1% Versus Dr Sam’s Flawless Nightly Serum Detailed comparison of The Ordinary Niacinamide 10% + Zinc 1% versus Dr Sam’s Flawless Nightly Serum. This oil-control serum is formulated around Niacinamide and Zinc PCA to balance excess oil and refine the look of pores. This smoothing serum is formulated around Niacinamide and Azelaic Acid to refine skin texture and fade the look of dark spots. No concerns Water Niacinamide 10% Pentylene Glycol Zinc PCA 1% Dimethyl Isosorbide Tamarindus Indica Seed Gum Xanthan Gum Isoceteth-20 Ethoxydiglycol Phenoxyethanol Chlorphenesin Water, Niacinamide 10%, Pentylene Glycol, Zinc PCA 1%, Dimethyl Isosorbide, Tamarindus Indica Seed Gum, Xanthan Gum, Isoceteth-20, Ethoxydiglycol, Phenoxyethanol, Chlorphenesin Butylene Glycol Niacinamide Azelaic Acid Dicaprylyl Carbonate Glycerin Cetearyl Alcohol Bakuchiol Tapioca Starch Benzyl Alcohol Allantoin Sodium Stearoyl Glutamate Hydroxypinacolone Retinoate Disodium EDTA Dehydroacetic Acid Polymethylsilsesquioxane Water, Butylene Glycol, Niacinamide, Azelaic Acid, Dicaprylyl Carbonate, Glycerin, Ethoxydiglycol, Cetearyl Alcohol, Dimethyl Isosorbide, Bakuchiol, Tapioca Starch, Benzyl Alcohol, Allantoin, Sodium Stearoyl Glutamate, Xanthan Gum, Phenoxyethanol, Hydroxypinacolone Retinoate, Disodium EDTA, Dehydroacetic Acid, Polymethylsilsesquioxane These ingredients are found in both products. Ingredients higher up in an ingredient list are typically present in a larger amount. Dimethyl Isosorbide (often shortened to DMI) is a sugar-derived solvent made from sorbitol. It's used to dissolve tricky ingredients and help them mix smoothly into a formula. Many actives sit as gritty crystals when undissolved, so DMI swoops in to full dissolve them. This helps improve texture, stability, and how evenly an active is distributed. It does have a penetration-enhancing reputation that is a bit more nuanced than marketing suggests; a cell study on human skin found that 10% DMI didn't significantly boost the permeation of Hydroquinone, Salicylic Acid, or Octadecenedioic Acid compared to controls (though it did improve their solubility in the formula itself). Typical usage concentrations usually range from 1-10% depending on the formula's needs; this ingredient is also well tolerated at these levels. Ethoxydiglycol (aka Diethylene Glycol Monoethyl Ether) is one of the cosmetic world's quiet problem solvers. In a formula, it is a solvent that dissolves tricky ingredients that don't want to mix in and helps spread ingredients evenly across your skin without leaving a greasy or sticky feeling This makes it great for hard-to-dissolve actives like vitamin C, benzoyl peroxide, and self-tanner DHA. It also has mild humectant and penetration enhancer abilities so it can help some actives absorb a little deeper. The penetration boost is backed by lab research: studies using human skin samples found it improved how well an active dissolves into the upper layer of skin rather than tearing down your skin barrier. Reviews of its mechanism also describe it interacting gently with the lipids and water in your outermost layer of skin. Just know this penetration-enhancing effect is not universal. It helps a lot in some formulas and did very little in others (so the benefit really depends on the specific product). Safety-wise, the evidence is reassuring. The Cosmetic Ingredient Review Expert Panel reviewed it and concluded it's safe for use in cosmetics and recognized it as non-irritating, non-sensitizing, and non-comedogenic in skincare. Typical leave-on skincare usage lands around 1-10%. The EU has sets caps of 2.6% in non-spray products, 10% in rinse-offs, 7% in oxidative hair dye, and 5% in non-oxidative hair dye. 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