Evaluating the vitamin D content in sardines and mackerel
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Vitamin D is an important secosteroid hormone that is responsible for calcium and phosphorus homeostasis. Vitamin D deficiency and insufficiency are an ever increasing global problem. Very few foods naturally contain vitamin D; such as salmon, and sundried or ultraviolet irradiated mushrooms. Few foods are fortified with vitamin D such as milk, orange juice, cereal and bread. Little is known about the vitamin D levels in certain fish such as sardines. The purpose of this study was to find out whether sardines and mackerel are a good source of vitamin D such as wild salmon. It was hypothesized that both sardines and mackerel are a good source of vitamin D. Based on the results, sardines are a good source of vitamin D. One serving size (3.5 ounces, about 5 fish) of sardines has about 330.8 IU's of vitamin D3. This is equal to 66.2 IU's of vitamin D3 per fish. Mackerel on the other hand does not have as much vitamin D3 as sardines. A standard serving of mackerel (3.5 ounces, about 3 fish) has 81.6 IU's of vitamin D3. This is approximately 27.2 IU's of vitamin D3 per fish. Both mackerel and sardines are good sources of vitamin D3.