Quantcast
Channel: Alltop RSS feed for beauty.alltop.com
Viewing all articles
Browse latest Browse all 157589

Sunscreens: How do I understand the logic behind SPF numbers?

0
0
Poulette ponders…Can someone help me understand the logic behind how SPF numbers are allocated to sunscreens? I’m thinking primarily of SS using physical barriers like zinc oxide & TO. For example, Josie Maran claims SPF 40 with Titanium Dioxide 9.5%, Zinc Oxide 6.0%, while Snowberry Everyday SPF has 16% ZO and claims SPF 15. There [...]

Viewing all articles
Browse latest Browse all 157589

Latest Images

Trending Articles





Latest Images