Obagi Professional-C® Suncare Broad Spectrum SPF30 Sunscreen combines broad-spectrum SPF 30 in a 10% L-ascorbic acid formulation. This multitasker helps protect against harmful UVA and UVB rays while addressing the appearance of skin aging. L-ascorbic Acid is known to support new collagen production and is also effective in reducing the appearance of fine lines, wrinkles and photoaging of the skin.