However, there is a small number food product rich in vitamin D and these products are reraly consumed. the richest natural sourcesof this compound are marine fish such as sadines,mackerel,salmon,herring and cod liver oil.thes product contain 1-135 micro/g of vitamin D in 100 g. Recommended daily dose of vitamin D at the level of 5-15 micro/g seems to be too low,as evidencedby numerous studies. reportedthe need to increase the recommented dose for adult to at least 50 micro/g.Three years later he suggested that it should be increased even further to the level of 50-175 micro. Therefore,is a need for new,exgenous sources of vitaminD