We get it, its a silly question and I'm sure we all think we already know the answer. But Dr. Thomas Macsay of Sunshine Rituals has a few key things he touches on in this brief how & when that makes it quite worth the read.
As science has clearly outlined many of the issues with sunscreens of yesterday, so too has it allowed us to understand much of the science behind herbal based sunscreens and traditional pastes that were used by ancient civilizations that frequently dealt with the sun’s harsh rays.
The types and number of chemicals needed to create an SPF rating of 100 typically do not have strong UVA blocking qualities and therefore may increase the risk of skin cancer development compared to a standard SPF 50 product.
As a science, environmental consciousness, and our general relationship to the earth has developed it has become apparent that creating chemically burdened and nano-tech formulations of sunscreens is ultimately harming those who use it and the immediate environment that the individual used the sunscreen in.
The use of natural plant-based sunscreens thus dates back thousands of years to various cultures such as the ancient Greeks who used olive oil, the Egyptians who used rice extracts, or the seafaring societies of South-East Asia who used pastes made from water reeds or barks, such as thanaka, to prevent them from the harsh reflection of the sun by the ocean.