Dr. Barbara Sturm Hyaluronic Serum Versus The INKEY List Hyaluronic Acid Serum

Dr. Barbara Sturm Hyaluronic Serum Versus The INKEY List Hyaluronic Acid Serum Detailed comparison of Dr. Barbara Sturm Hyaluronic Serum versus The INKEY List Hyaluronic Acid Serum EU & Canada. This hydrating serum is formulated around Sodium Hyaluronate to hydrate skin and strengthen the skin barrier. This hydrating serum is formulated around Sodium Hyaluronate and Hyaluronic Acid to hydrate skin and strengthen the skin barrier. Water Butylene Glycol Lactobacillus/Portulaca Oleracea Ferment Extract Phenoxyethanol Sodium Hyaluronate Ethylhexylglycerin Potassium Sorbate Leuconostoc/Radish Root Ferment Filtrate Water, Butylene Glycol, Lactobacillus/Portulaca Oleracea Ferment Extract, Phenoxyethanol, Sodium Hyaluronate, Ethylhexylglycerin, Potassium Sorbate, Leuconostoc/Radish Root Ferment Filtrate Propanediol Glycerin Ammonium Acryloyldimethyltaurate/Vp Copolymer Hyaluronic Acid Carbomer Sodium Lactate Polysorbate 20 Palmitoyl Tetrapeptide-7 Palmitoyl Tripeptide-1 Water, Propanediol, Sodium Hyaluronate, Glycerin, Butylene Glycol, Phenoxyethanol, Ammonium Acryloyldimethyltaurate/Vp Copolymer, Leuconostoc/Radish Root Ferment Filtrate, Hyaluronic Acid, Carbomer, Sodium Lactate, 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. Leuconostoc/Radish Root Ferment Filtrate is a natural preservative. It comes from fermenting radish roots with a bacteria called leuconostoc. The trade name for this ingredient is Leucidal. Leuconostoc comes from lactic acid. This ingredient has antimicrobial properties and helps prevent the growth of bacteria in a product. Leuconostoc is used to make the traditional Korean side-dish, kimchi. It is also used to make sourdough bread (both incredibly yummy foods). 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 preservative at up to 1%, including for children of all ages. Adverse systemic effects only showed up in animal studies at exposures roughly 200x higher than what people get from cosmetics. And despite its very widespread use, this ingredient is a rare sensitizer and allergic reactions are uncommon. Sodium Hyaluronate is the salt form of hyaluronic acid. It is a long sugar chain that is naturally found in your skin, joints, and connective tissue that maintains hydration and elasticity. In skincare, it works as a humectant. It pulls water from the environment and deeper layers of skin and binds it to the surface. Interestingly, the size of the molecule affects its behavior: Some clinical evidence links low molecular weight versions to improved wrinkle depth, elasticity, anti-inflammatory effects, and barrier repair. Many serums use a blend of both weights so you can get surface hydration plus longer-lasting and deeper effects. You'll typically see concentrations