so joining us live now to talk more about that and share some tips to stay safe, is emily spillman, the environmental working group's healthy living science program manager. thanks for being here. let's dive right into the study. how many sunscreens did research look at here? >> so our assessment included over 1700 sunscreens. and so that includes your beach and sport recreational sunscreens daily. use spf products including moisturizers and lip balms. so it's quite a range. >> wow. this is a lot more extensive than i had anticipated. i didn't even know there were, i don't know more than 100 different types. what were the criteria that, you know, they used to measure safety and sun protection? was it just spf? >> so our assessment looks at, information that's available on product labels. so we're looking at the ingredients that are going into products. and we're also looking at the spf value and the expected protection based on the products in the formulation. okay. >> and what was the result of their study. >> and so what we found was that, as you noted, only 25% of products provide wh