What is the difference between chemical and physical SPF?Updated 3 months agoChemicalPhysicalActive IngredientsMay include Oxybenzone, Avobenzone, Octisalate, Octocrylene, Homosalate and Octinoxate (which can lead to coral reef damage)Zinc Oxide, Titanium DioxideHow it Protects the SkinAbsorbs UV rays Ingredients penetrate the top layers of the skin to absorb UV rays before they can damage the skinReflects UV raysIngredients form a barrier on the surface of the skin that helps reflect UV rays away from the skinPrimary BenefitsDepending on the formulation, chemical sunscreens may be easier to rub into the skin and less likely to leave a white castTends to be difficult to fully blend into the skin, leaving a white cast, but is more moisturizingNeeds to be applied at least 15-20 mins before sun exposure Can start working immediately after applicationOffers better water and sweat resistance since it's absorbed into the skinLasts longer when in direct UV light, but not when swimming or sweatingLess product is needed for protection since it is a thinner consistency and spreads more easily Tends to be less irritating and better for sensitive skin since it's not absorbed Was this article helpful? YesNo