Vitamin D
Vitamin D comes from three sources: the sun, food (e.g., fish, milk, salmon), and dietary supplements. It is a fat-soluble vitamin, meaning that i...
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The most common mineral in the human body is calcium. It is important for many of the body's functions, including proper muscle function, nerve tra...
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Zinc is a metal. It is known as an essential trace element because humans need only small amounts in order for our bodies to function properly. It ...
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