Sunscreens protect the skin from skin cancer and premature aging, but they also inhibit the body's ability to produce vitamin D by nearly 98%. It is estimated that 40% of children and 60% of adults are deficient in vitamin D, but people need to wear sunscreen for skin protection. Therefore, researchers developed a sunscreen that protects the skin while allowing the body to manufacture vitamin D from the sun. Sunscreen Formulations Sunscreens are typically formulated with several compounds that absorb varying wavelengths of UVB radiation. T those ingrediehe creators of Solar D reorganizes those filters to provide the same SPF as regular sunscreen but allowed some UVB through for vitamin D productsion. Read more at Skin Inc.