Dermagenics recently authored a white paper explaining the differences between physical and chemical UV filters. The white paper pulls together facts and studies from a variety of sources, and is one of the most complete reports of its kind. We thought it was important to provide this information to skin care professionals and consumers alike, because so much conflicting information is available regarding sunscreen ingredients. The paper can be accessed here, and we encourage everyone who is interested in learning the truth about sunscreen ingredients to have a look.