Paula's Choice Resist Youth-Extending Daily Hydrating Fluid SPF 50 Versus Biore UV Aqua Rich Watery Essence Sunscreen SPF 50+ PA++++

Paula's Choice Resist Youth-Extending Daily Hydrating Fluid SPF 50 Versus Biore UV Aqua Rich Watery Essence Sunscreen SPF 50+ PA++++ Detailed comparison of Paula's Choice Resist Youth-Extending Daily Hydrating Fluid SPF 50 versus Biore UV Aqua Rich Watery Essence Sunscreen SPF 50+ PA++++ Botanical Peony Edition. This hybrid sunscreen covers the full UV range and blocks ~98% of UVB at SPF 50. This chemical sunscreen covers the full UV range and blocks ~98% of UVB at SPF 50. Butyl Methoxydibenzoylmethane 2% Ethylhexyl Methoxycinnamate 7.5% Ethylhexyl Salicylate 5% Octocrylene 2% Water Glycerin Silica Dimethicone Tocopherol Chamomilla Recutita Flower Extract Vitis Vinifera Seed Extract Camellia Sinensis Leaf Extract Camellia Oleifera Leaf Extract Peucedanum Graveolens Extract Sambucus Nigra Fruit Extract Avena Sativa Bran Extract Punica Granatum Extract Lycium Barbarum Fruit Extract Hydrogenated Lecithin Titanium Dioxide Dimethicone/Vinyl Dimethicone Crosspolymer Diethylhexyl Syringylidenemalonate Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer Xanthan Gum Sodium Carbomer Benzyl Alcohol Sodium Benzoate Potassium Sorbate Phenoxyethanol Butyl Methoxydibenzoylmethane 2%, Ethylhexyl Methoxycinnamate 7.5%, Ethylhexyl Salicylate 5%, Octocrylene 2%, Water, Glycerin, Silica, Dimethicone, Tocopherol, Chamomilla Recutita Flower Extract, Vitis Vinifera Seed Extract, Camellia Sinensis Leaf Extract, Camellia Oleifera Leaf Extract, Peucedanum Graveolens Extract, Sambucus Nigra Fruit Extract, Avena Sativa Bran Extract, Punica Granatum Extract, Lycium Barbarum Fruit Extract, Hydrogenated Lecithin, Titanium Dioxide, Dimethicone/Vinyl Dimethicone Crosspolymer, Diethylhexyl Syringylidenemalonate, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Xanthan Gum, Sodium Carbomer, Benzyl Alcohol, Sodium Benzoate, Potassium Sorbate, Phenoxyethanol Alcohol Ethylhexyl Methoxycinnamate Ethylhexyl Triazone Isopropyl Palmitate Lauryl Methacrylate/Sodium Methacrylate Crosspolymer Diethylamino Hydroxybenzoyl Hexyl Benzoate Hydrogenated Polyisobutene Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine Dextrin Palmitate Butylene Glycol Xylitol Acrylates/C10-30 Alkyl Acrylate Crosspolymer Avena Sativa Kernel Extract Glyceryl Stearate Propanediol Glyceryl Behenate Vinyl Dimethicone/Methicone Silsesquioxane Crosspolymer Agar Sorbitan Distearate Isoceteth-20 Polyvinyl Alcohol Sodium Stearoyl Glutamate Arginine Potassium Hydroxide Sodium Hydroxide Royal Jelly Extract Sodium Hyaluronate Disodium EDTA BHT Parfum Water, Alcohol, Ethylhexyl Methoxycinnamate, Ethylhexyl Triazone, Isopropyl Palmitate, Lauryl Methacrylate/Sodium Methacrylate Crosspolymer, Diethylamino Hydroxybenzoyl Hexyl Benzoate, Hydrogenated Polyisobutene, Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine, Dextrin Palmitate, Butylene Glycol, Xylitol, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Dimethicone, Avena Sativa Kernel Extract, Glycerin, Glyceryl Stearate, Propanediol, Glyceryl Behenate, Vinyl Dimethicone/Methicone Silsesquioxane Crosspolymer, Agar, Sorbitan Distearate, Isoceteth-20, Polyvinyl Alcohol, Dimethicone/Vinyl Dimethicone Crosspolymer, Sodium Stearoyl Glutamate, Arginine, Potassium Hydroxide, Sodium Hydroxide, Royal Jelly Extract, Sodium Hyaluronate, Phenoxyethanol, Disodium EDTA, BHT, Parfum These ingredients are found in both products. Ingredients higher up in an ingredient list are typically present in a larger amount. Dimethicone is a type of synthetic silicone created from natural materials such as quartz. It is also known as polydimethylsiloxane. What it does: Dimethicone comes in different viscosities: Depending on the viscosity, dimethicone has different properties. Ingredients lists don't always show which type is used, so we recommend reaching out to the brand if you have questions about the viscosity. This ingredient is unlikely to cause irritation because it does not get absorbed into skin. However, people with silicone allergies should be careful about using this ingredient. Note: Dimethicone may contribute to pilling. This is because it is not oil or water soluble, so pilling may occur when layered with products. When mixed with heavy oils in a formula, the outcome is also quite greasy. This ingredient is a silicone elastomer that works as a texture enhancer, adds a silky slip, and also helps absorb excess oil. Because it's a large macromolecule that's insoluble in water and chemically inert, it's not expected to penetrate or be absorbed into skin. Human patch tests with a facial lotion containing 1% of this ingredient found no sensitization. This ingredient is also known as Octinoxate and is one of the oldest and most widely used chemical UV filters in skincare. It has a simple job: soap up UVB radiation (290-320 nm), the wavelengths responsible for sunburn and a big chunk of long-term sun damage. In formulas, it's always paired with a separate UVA filter because octinoxate solely protects skin from UVB. Because it's an oil-soluble liquid, it's easy to blend into the oil phase of lotions/creams and gives a cosmetically elegant feel. The one quirk about formulating this ingredient is photostability; the molecule slowly changes shape into a less effective version when sunlight hits it. So the longer you're in the sun, the weaker its protection gets. The drop can be more than 30% in some formulas. It also doesn't play nice with Avobenzone (the common UVA filter) since avobenzone destabilizes octinoxate and the two degrade each other. But don't worry: brands have solved this issue by adding photostabilizers like Tinosorb S to prevent degradation and keep SPF stable under heavy UV exposure. The maximum allowed level is 10% in the EU and Australia, 7.5% in the US and Canada, and 20% in Japan. The Cosmetic Ingredient Review Panel has concluded this ingredient to be safe in cosmetics up to 10%. One last thing worth knowing for context: Octinoxate has been the subject of ongoing review in Europe where the Scientific Committee on Consumer Safety's (SCCS) 2025 final opinion is that this ingredient is an endocrine-active substance. Lab and animal studies suggest it can act a bit like a hormone in the body (mildly mimicking estrogen and slightly blocking male hormones). It's important to know this hasn't really been shown to happen