Vitamin D is a fat soluble vitamin that is found in food and is produced by the skin in response to exposure to UV radiation from natural sunlight.It is nearly impossible to get adequate amounts of vitamin D from your diet alone. Sunlight to the skin or intravenous injections are the most reliable way to generate sufficient vitamin D in your body.
The further you live from the equator, the longer exposure you need to the sun in order to generate vitamin D Sufficient levels of vitamin D are crucial for calcium absorption in your intestines. Without vitamin D, your body cannot absorb calcium containing supplements.People with darker skin may need 20-30 times as much exposure to sunlight as fair -skinned people to generate the same amount of vitamin D.
Vitamin D deficiency cannot be reversed overnight. It takes months of supplementation and sunlight to rebuild the body’s bones and nervous system. This is why vitamin D injections are so valuable.
Did you know that a person would have to drink 10 tall glasses of vitamin D fortified milk each day just to get a minimum of what is required by the human body? The major biologic function of vitamin D is to maintain normal blood levels of calcium and phosphorus. By promoting calcium absorption, vitamin D helps to form and maintain strong bones. Vitamin D also works in concert with a number of other vitamins, minerals, and hormones to promote bone mineralization. Without vitamin D, bones can become thin, brittle, or misshapen. Vitamin D sufficiency prevents rickets in children and osteomalacia in adults, two forms of skeletal diseases that weaken bones.