Vitamin D is produced by the bare skin when exposed directly to sunlight. The risk factors for deficiency may include environmental conditions e.g. geographical locations, sun protection, nutrient deficiencies, inflammatory diseases, age and skin type. Try exposing your bare skin to 10mins of direct sunlight daily. Small amounts of vitamin D can be found in fatty fish e.g. salmon, tuna and sardines, beef and liver, eggs and some fortified foods. It is estimated that 31% of adults in Australians have a vitamin D deficiency (Nowson & Margeison 2002).