Do They Work? Colorescience SPF Powder, Skinnies "Pea-Sized Amount" | Lab Muffin Beauty Science

I've had a lot of questions about what I think of some sunscreen products with unusual claims - in this video I talk about whether Colorescience's powder sunscreen gives SPF 50, and whether you can really just apply a pea-sized amount of Skinnies sunscreen. Subscribe for videos every fortnight: http://bit.ly/labmuffinyt Let me know what other products you want me to look at in the comments! Blog post with more info here: https://labmuffin.com/do-they-work-colorescience-spf-powder-skinnies-pea-sized-amount-with-video Colorescience FDA submission data: SPF/amount applied relationship: https://doi.org/10.1111/phpp.12099 Skin topology and sunscreen: https://doi.org/10.1159/000450760 More info about choosing sunscreens (in the free sample of my eBook): https://labmuffin.com/skin Erratum: I messed up a little in explaining the methodology for calculating the weighted average for the Colorescience powder - they used the minimum for the lowest time bracket, then the midpoint for the others, so their estimate was less conservative than what I described. ----ABOUT---- Lab Muffin Beauty Science is a channel by me, Michelle - I'm a chemistry PhD and beauty lover, here to explain how beauty products work, debunk myths, and help you make smarter decisions about your skincare, hair and makeup! ----FOLLOW---- Blog https://labmuffin.com Instagram https://instagram.com/labmuffinbeautyscience Facebook https://facebook.com/labmuffin Twitter https://twitter.com/labmuffin --