History of Sunscreen...
The first sunscreen appeared in the late 1960s. Its main purpose was to try to minimize the effects of ultraviolet light from the sun. It wasn’t until about 1972, that labeling of the sun protection factor, or SPF, was introduced in the U.S. These sunscreens, which were improved and modified over time, were designed to block ultraviolet-B radiation.
In the late 1980s that researchers determined that although ultraviolet-B light initiates most skin cancers, ultraviolet-A rays also play a role in promoting skin cancer. So, in the early 1990s, sunscreens were improved to contain ultraviolet-A blockers via an ingredient called Parsol 1789.
In the late 1980s that researchers determined that although ultraviolet-B light initiates most skin cancers, ultraviolet-A rays also play a role in promoting skin cancer. So, in the early 1990s, sunscreens were improved to contain ultraviolet-A blockers via an ingredient called Parsol 1789.
