- Apr 22, 2004
Those are old myths. Chemical sunscreen works by forming a physical UV filter ON the skin. The difference in heat conversion between physical and chemical sunscreen is only a 5% difference. Physical sunscreen reflects 5% of UVB and absorbs the rest.Physical vs chemical sunscreens.
What is the difference between a physical and a chemical sunscreen?
Chemical sunscreen absorbs into the skin and then absorbs UV rays, converts the rays into heat, and releases them from the body. ... Physical sunblock sits on top of the skin and reflects the sun's rays. The minerals titanium dioxide and zinc oxide are the main active ingredients in physical blocks.”
Physical sunscreen cannot reach above UVA PF35 unlike chemical sunscreen which can reach over UVA PF35 easily with the newer filters. UVA consists of 95% of the sun’s total UV breakdown.
Titanium dioxide and zinc oxide are often categorised as "physical" sunscreens, whereas every other sunscreen used is considered a “chemical”
Are chemical or physical sunscreens better? I touched on this in my Sunscreen and Make-up video, but a lot of people have been asking me to talk more about it, so I’ve expanded on the topic in this…