Vitamin D aids in the absorption of calcium and phosphorus so it is essential to proper bone and tooth formation. It also plays an important role in nerve and muscle function. Assure proper Vitamin D intake with this easy-to-take natural supplement. Vitamin D is necessary for the intestines to absorb dietary calcium. Vitamin D comes from a few foods, such as cod liver oil, oily fish (including salmon, mackerel, and sardines), and fortified dairy products and breakfast cereals. It is also produced by the skin upon exposure to sunlight. People who do not receive adequate amounts of sun exposure are at risk of developing vitamin D deficiency. Active children and young adults living in sunny regions (Southern California, Hawaii, countries around the equator, etc.) can produce most of the vitamin D they need from their skin. But in the northern United States, there is insufficient sunlight during the winter for adequate vitamin D production by the skin. And vitamin D deficiency is common among elderly individuals. For people who are unable to obtain sunlight exposure, vitamin D supplementation may be worthwhile. The amount recommended by most doctors ranges from 400 to 1,000 IU per day. Although excessive doses of vitamin D can be toxic, recent research suggests that long-term use of 1,000 IU per day is safe. Getting optimal amounts of vitamin D may have a positive influence on blood sugar levels, possibly reducing the risk of developing insulin resistance. Up to 25% of the adult population in America are resistant to insulin to some degree. Normally, the carbohydrate in the food you eat is eventually broken down into glucose (also known as blood sugar). Glucose, in turn, triggers the release of the hormone insulin.Insulin helps to move nutrients from the blood into the cells of your body. However, in someone with insulin resistance, muscle cells are not able to deal with glucose properly. In a study published in the American Journal of Clinical Nutrition, vitamin D status (as determined by blood levels of 25-hydroxyvitamin D) was assessed in a group of healthy young volunteers. Insulin resistance was also measured. Lower blood levels of vitamin D were associated with a greater degree of insulin resistance. No Sugar, Salt, Starch, Preservatives or Artificial Coloring Added.