In vitro Critical Wavelength Broadspectrum claim FDA 2011

On June 2011 the U.S. Food and Drug Administration (FDA) announced new requirements for sunscreens currently sold over-the-counter (OTC). Sunscreens that pass FDA’s In vitro Critical Wavelength test procedure, which measures a product’s ultraviolet A (UVA) protection relative to its ultraviolet B (UVB) protection, may be labeled as «Broad Spectrum» with SPF value on the front label. This test is based upon an in vitro spectrophotometric measurement technique including an UV exposition to a representative dose of sun-simulated ultraviolet radiation, to allow for any photo-unstability of the active ingredients contained within the sun protection product.