Vitamin D3 enhances calcium absorption and retention, a key nutritional role in supporting healthy bones, and may play a potential role in cardiovascular, colon and cellular health. Vitamin D levels have been shown to decline with age, due primarily to a reduction in either absorption or metabolism by the liver. Decreased exposure to sunlight or a vegetarian diet play a role in inadequate vitamin D levels. Rate of absorption is far more important than just dose when it come to oral supplementation of Vitamin D. Inulin: Inulin fiber is a carbohydrate belonging to a class of compounds known as fructans. Because inulin fiber is resistant to digestion in the upper gastrointestional tract it reaches the large intestine essentially intact, where it is fermented by probiotic bacteria. Inulin fiber naturally occurs as a series of oligo- and polysaccharides with different chain lengths. Inulin fiber is not absorbed from the gastrointestinal system. Perhaps the best-known nutritional effects of inulin and oligofructose are their actions to stimulate bifidobacteria growth in the intestine. Preliminary studies suggest that adding inulin to calcium-rich foods like yogurt may boost calcium absorption. Soluble and insoluble fibers both contribute to gastrointestinal health, albeit in different ways. Insoluble fibers contribute to gastrointestinal health by promoting regularity and peristalsis, yet a soluble fiber such as inulin boasts a somewhat wider range of benefits. Unlike their insoluble counterparts, soluble fibers are fermentable and their contribution to gastrointestinal health consists largely of the by-products of this fermentation, including short chain fatty acids (SCFA's) such as butyric and propionic acid. These in turn help regulate glucose metabolism, lower plasma cholesterol levels, stimulate the immune system, and of course promote the growth of beneficial gastrointestinal flora.
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