Vitamin deficiency and vitamin K deficiency. In the medical literature, any of these may also be called by names on the pattern of "hypovitaminosis" or "avitaminosis" + "[letter of vitamin]", for example, hypovitaminosis A, hypovitaminosis C, hypovitaminosis D. Conversely hypervitaminosis is the syndrome of symptoms caused by over-retention of fat-soluble vitamins in the body. Vitamin deficiency A vitamin deficiency can cause a disease or syndrome known as an avitaminosis or hypovitaminosis. This usually refers to a long-term deficiency of a vitamin. When caused by inadequate nutrition it can be classed as a "primary deficiency", and when due to an underlying disorder such
Vitamin A deficiency in 2007 and will cover 18 countries. The program gives children two high-dose vitamin A and antiparasitic supplements (twice a year for four years), which provides children with enough of the nutrient during their most vulnerable years to prevent them from going blind and suffering from other life-threatening diseases related to VAD. About 75% the vitamin A required for supplementation activity by developing countries is supplied by the Micronutrient Initiative with support from the Canadian International Development Agency. An estimated 1.25 million deaths due to VAD have been averted in 40 countries since 1998. In 2008, an estimated annual investment