Liver, tripe, and kidney have some of the highest concentrations of vitamin D of any foods available. While humans get much of their required vitamin D from exposure to the sun, diet provides a good alternative or addition. Vitamin D is crucial to maintaining healthy bones, and it aids in the absorption of calcium; a vitamin D deficiency can lead to osteoporosis. A healthy level of vitamin D also reduces the risk of cancer, flu, cardiovascular disease, and diabetes.

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