The Kaufmann Diet is all about using nutrition as a powerful tool to support good health, prevent disease, and sometimes even reverse diseases. In this series, we break down the components of nutrition into their specific parts, and discuss how they can support––and sometimes hinder––our health. The second part of this series covers vitamins, what they are, how they fit into your Kaufmann Diet, and the best sources of these nutrients.
Vitamin D is a fat-soluble vitamin that is necessary for maintaining the health of bones and teeth, supporting the immune system, brain, and nervous system, and regulating insulin levels, among other functions. Ergocalciferol (vitamin D2) and cholecalciferol (vitamin D3) are the two main forms of vitamin D, each differing in their source, structure, and potency.
Ergocalciferol (Vitamin D2) is synthesized by plants, fungi, and invertebrates. It is found in mushrooms (especially those exposed to UV light) and fortified foods.
Cholecalciferol (Vitamin D3) is synthesized in the skin of humans and animals when exposed to ultraviolet B (UVB) radiation from the sun. It is found in fatty fish, fish liver oils, egg yolks, and fortified foods. It is also produced when the skin is exposed to sunlight.
Both D2 and D3 are absorbed well from the intestine, but their effectiveness in raising blood levels of vitamin D differs. Both forms are converted in the liver to 25-hydroxyvitamin D (calcidiol) and then in the kidneys to the Vitamin D3 is generally considered more effective at raising and maintaining adequate levels of 25-hydroxyvitamin D in the blood. It has a longer half-life in the bloodstream compared to D2. Cholecalciferol (D3) is considered to be more potent and stable than ergocalciferol (D2). Studies suggest that D3 is about three times more effective at raising blood levels of vitamin D than D2.
Both D2 and D3 are used in dietary supplements and fortified foods, though D3 is more commonly recommended and used due to its higher potency and efficacy.
Functions of Vitamin D:
Bone Health: Vitamin D promotes calcium absorption in the gut and maintains adequate serum calcium and phosphate concentrations, which enables normal bone mineralization and prevents hypocalcemic tetany. It is essential for bone growth and bone remodeling by osteoblasts and osteoclasts.
Immune System Support: Vitamin D modulates the immune response and has anti-inflammatory effects.
Cell Growth: Vitamin D is involved in cell growth, neuromuscular function, and reduction of inflammation.
Vitamin D deficiency can lead to several health problems. In children, severe deficiency can cause rickets, a condition characterized by impaired bone mineralization, leading to bone deformities. In adults, deficiency can result in osteomalacia (softening of the bones) or contribute to osteoporosis (reduced bone density and increased fracture risk). Some studies suggest that low levels of vitamin D are associated with an increased risk of chronic diseases such as cardiovascular disease, diabetes, and certain cancers. So, getting enough vitamin D is important!
Sources of Vitamin D
1. Sunlight: The skin synthesizes vitamin D when exposed to ultraviolet B (UVB) rays from the sun.
2. Food: It can also be obtained from dietary sources such as fatty fish (e.g., salmon, mackerel, and sardines) and fish liver oils.
3. Supplements: Vitamin D supplements can be used to ensure adequate intake, especially in individuals with limited sun exposure or absorption issues.
The Anti-fungal Effects of Vitamin D
Vitamin D itself is not primarily recognized for its anti-fungal properties. However, some studies suggest that vitamin D, particularly its active form calcitriol (1,25-dihydroxyvitamin D3), may have indirect effects on fungal infections through its role in modulating the immune system:
Immune Modulation
Vitamin D plays a significant role in the regulation of the immune system, which can affect the body’s ability to fight off infections, including fungal infections. It enhances the pathogen-fighting effects of monocytes and macrophages—white blood cells that are critical to the immune defense—and decreases inflammation.
Antimicrobial Peptides
Vitamin D can induce the expression of antimicrobial peptides like cathelicidin and defensins. These peptides are part of the innate immune response and have broad-spectrum antimicrobial properties, including against fungi.
Some research indicates that higher levels of vitamin D might be associated with a lower incidence of certain fungal infections. For example:
Candida Infections: There is evidence suggesting that vitamin D can reduce the growth of Candida species, which are common fungal pathogens.
Aspergillus Infections: Some studies have shown that vitamin D can influence the immune response to Aspergillus fumigatus.
What Are The Most Common Nutrient Deficiencies?
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We encourage all visitors to this site to take some time and study these technical articles prior to initiating lifestyle changes, including dietary changes and to do so with their physician’s awareness and approval. The articles posted in this link are scientific and with few exceptions are taken from medical journals familiar to healthcare workers.
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