The sun’s ultraviolet spectrum ranges from 290 nanometers (nm) to 400 nm, with UVB rays at the lower end and UVA rays at the higher end. Broad-spectrum protection refers to sunscreen products that contain ingredients that protect against UVB and UVA rays up to 360 nm or above. Avobenzone and zinc oxide are FDA-approved sunscreen active ingredients that provide broad-spectrum protection throughout the entire UVA spectrum.