Great question! The term “broad spectrum” refers to protection against both UVA and UVB rays. UVB is the stronger of the two and causes sunburn; UVA rays are responsible for premature aging. However both types of rays have been known to lead to skin cancer. The qualification of Broad Spectrum means that it is FDA-approved against both types.
While you’re looking for the broad-spectrum label, it’s also a good idea to check the SPF (Sun Protection Factor), which is the sunscreen’s ability to block UVB rays. According to the American Academy of Dermatology, SPF 30 filters out 97% of harmful rays, which is the recommended starting point for SPF levels.