Biretix Isorepair Cream Versus Paula's Choice 10% Azelaic Acid Booster

Biretix Isorepair Cream Versus Paula's Choice 10% Azelaic Acid Booster Detailed comparison of Biretix Isorepair Cream versus Paula's Choice 10% Azelaic Acid Booster. This barrier-repair moisturizer is formulated around Squalane and Snail Secretion Filtrate to strengthen the skin barrier and hydrate skin. This calming treatment is formulated around Azelaic Acid and Salicylic Acid to calm redness and fade the look of dark spots. Water C12-20 Acid PEG-8 Ester Squalane Snail Secretion Filtrate C12-15 Alkyl Benzoate Hexylene Glycol Saccharide Isomerate PPG-20 Methyl Glucose Ether Dipropylene Glycol Ammonium Acryloyldimethyltaurate/Vp Copolymer Propanediol Fructose Glucose Cetyl Alcohol Tocopheryl Acetate Arginine Gluconolactone Boswellia Serrata Gum Extract Glucosyl Ceramide Phospholipids Cholesterol Calcium Gluconate Sodium Hyaluronate Sucrose Urea Dextrin Alanine Glutamic Acid Aspartic Acid Hexyl Nicotinate Maltodextrin Phenoxyethanol Disodium EDTA Sodium Citrate Citric Acid Sodium Benzoate Parfum Water, C12-20 Acid PEG-8 Ester, Squalane, Snail Secretion Filtrate, C12-15 Alkyl Benzoate, Hexylene Glycol, Saccharide Isomerate, PPG-20 Methyl Glucose Ether, Dipropylene Glycol, Ammonium Acryloyldimethyltaurate/Vp Copolymer, Propanediol, Fructose, Glucose, Cetyl Alcohol, Tocopheryl Acetate, Arginine, Gluconolactone, Boswellia Serrata Gum Extract, Glucosyl Ceramide, Phospholipids, Cholesterol, Calcium Gluconate, Sodium Hyaluronate, Sucrose, Urea, Dextrin, Alanine, Glutamic Acid, Aspartic Acid, Hexyl Nicotinate, Maltodextrin, Phenoxyethanol, Disodium EDTA, Sodium Citrate, Citric Acid, Sodium Benzoate, Parfum Azelaic Acid Caprylic/Capric Triglyceride Methyl Glucose Sesquistearate Glycerin Cetearyl Alcohol Glyceryl Stearate Dimethicone Salicylic Acid Adenosine Glycyrrhiza Glabra Root Extract Boerhavia Diffusa Root Extract Allantoin Bisabolol Cyclopentasiloxane Xanthan Gum Sclerotium Gum Butylene Glycol Water, Azelaic Acid, C12-15 Alkyl Benzoate, Caprylic/Capric Triglyceride, Methyl Glucose Sesquistearate, Glycerin, Cetearyl Alcohol, Glyceryl Stearate, Dimethicone, Salicylic Acid, Adenosine, Glycyrrhiza Glabra Root Extract, Boerhavia Diffusa Root Extract, Allantoin, Bisabolol, Cyclopentasiloxane, Xanthan Gum, Sclerotium Gum, Propanediol, Butylene Glycol, Phenoxyethanol These ingredients are found in both products. Ingredients higher up in an ingredient list are typically present in a larger amount. C12-15 Alkyl Benzoate is a lightweight emollient made by combinig benzoic acid with fatty alcohols that are 12-15 carbons long. In cosmetics, it plays several roles: The Cosmetic Review Expert Panel has concluded the alkyl benzoate group to be safe as used in cosmetics; it wasn't found to be a skin irritant and unlikely to be absorbed due to its low water solubility. This report recorded almost 1000 reported uses with concentrations up to 59% in leave-on products but your cosmetics will typically use 0.5-15% depending on the product. It's often called a "SPF booster": this is because it keeps UV filters properly dissolved and evenly distributed to support a sunscreen's performance. It doesn't actually raise SPF on its own. Overall, this ingredient is well tolerated. This ingredient is fungal acne safe because it is an ester of benzoic acid. Think of this ingredient as two parts stuck together: an oily part and an acid part. Malassezia only gets a meal when it can snip off a fatty acid to eat. With C12-15 Alkyl Benzoate, the acid part is benzoic acid, which isn't a fatty acid and which the yeast can't use as food. Benzoic acid is actually used as a preservative to stop yeast from growing. The oily part is a blend of C12-15 fatty alcohols but fatty alcohols in this size range can support only a little Malassezia growth (mostly for one species of Malassezia as well). In the ingredient, those alcohols stay locked inside the molecule. The yeast can only reach them by snipping the benzoate bond, and that type of bond is harder for it to cut than a normal fatty bond. So not much gets released. And whatever does get snipped comes packaged with benzoic acid, which discourages yeast growth. 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 s