People on TikTok love testing skincare products on anything but skin. Apples, bread, paper, betadine, pH strips, UV cameras, phone apps - which ones actually work? Surprisingly, a few! I talk about the science behind why.

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0:00 Intro, testing sunscreen on toast
3:25 Can you test lip balm on paper?
9:25 pH testing Vaseline
12:24 pH testing vitamin C serums
15:12 Betadine (iodine) test for vitamin C
18:00 Vitamin C and apples
21:53 Sunscreen tests (OneSkin): UV sensor, UV cameras
32:20 "Acne-safe" makeup app
35:48 Yuka ratings for sunscreen
42:38 Dermatologist does every test to show which serums "actually work", I guess?

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🙋🏻 I'm Michelle, a chemistry PhD, cosmetic chemist and science educator, 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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