Dark skinned people, older individuals and those who are overweight or obese; tend to have much lower levels of vitamin D in their body.
Vitamin D is a group of fat-soluble secosteroids, the two major physiologically relevant forms of which are vitamin D2 (ergocalciferol) and vitamin D3 (cholecalciferol). Vitamin D without a subscript refers to either D2 or D3 or both.
There are two basic types of vitamin D. Ergosterol is the basic building block of vitamin D in plants. Cholesterol is the basic building block of vitamin D in humans. When ultraviolet light from the sun hits the leaf of a plant, ergosterol is converted into ergocalciferol, or vitamin D2. In just the same way, when ultraviolet light hits the cells of our skin, one form of cholesterol found in our skin cells-called 7-dehydrocholesterol-can be converted into cholecalciferol, a form of vitamin D3.
In the life of a plant, the ergocalciferol form of vitamin D2 serves to accomplish most of the desired purposes that were intended for this substance. In the life of a human, however, cholecalciferol is not the final intended form for this vitamin. In order for our bodies to come up with the fully active form of vitamin D3, further metabolism is required.
Preventing mold - To prevent mold on cheese, wrap it in a cloth dampened with saltwater before refrigerating.
Body Mass Index. Several population studies show that a diet without meat leads to lower BMIs–usually an indicator of a healthy weight and lack of fat on the body.
don't celebrate with a hot-fudge sundae every time they lose a pound.
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