You put your sunscreen on, apply makeup over it... but you're meant to reapply sunscreen every 2 hours. How do you reapply without messing up your makeup? And do you really need to reapply it? This video has your answers!

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In this video:
☀ Why do you need to reapply sunscreen?
☀ How much protection do you have after 2 hours?
☀ My situationbased approach to reapplication
☀ Which product for reapplication? Foundation vs powder vs spray vs lotion
☀ Sunscreen reapplication demonstration

Blog post for this video with more info, references etc: https://labmuffin.com/howtoreapply...
Sunscreen ingredient table download (free eBook sample chapter): https://labmuffin.com/skin'>https://labmuffin.com/skin
Sunscreen protection beyond 2 hours in indoor workers: https://doi.org/10.1080/09546634.2018... (shoutout to @kindofstephen for sharing this!)
Average amounts of powder and foundation: https://doi.org/10.1016/j.fct.2006.06..., http://ofmpub.epa.gov/eims/eimscomm.g...
Colorescience data: https://www.regulations.gov/document?...
James and Robert Welsh reapplying sunscreen:    • THIS Is How To Reapply Sunscreen Over...  

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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!

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Blog post for this video with more info: https://labmuffin.com/howtoreapply...

Editor: Matthew Lucis silverstitch.com

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