Why Vitamin D?

Most people have a vague idea that, if a nutrient was named after one of the first letters of the alphabet, it must be important, which is a fair assumption. We need vitamin D for bone health, muscle function, and an effective immune system, followed by a lot of “maybes.” In other words, the jury is still out on vitamin D as a cancer preventer, or a treatment for diabetes or multiple sclerosis. Where does it come from? This sounds crazy, but when ultraviolet light from the sun hits our skin, it somehow causes the body to produce a “group of fat-soluble secosteroids.” We can also consume our vitamin D in a more conventional way, through eating food. Certain fish and their

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