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Normal Vitamin D Levels

Vitamin D is one of the essential vitamins that the body needs in order to survive. It is a vitamin that dissolves when there is a presence of fat, thus, it is called the fat soluble vitamin. When a person has normal vitamin D levels in the body, he or she can be protected from many diseases brought about by the insufficient supply of vitamin D.

For the body to use the vitamin appropriately, the D vitamin has to undergo different hydroxylations first. Vitamin D is converted to 25-hydroxyvitamin D by the liver, after which, the kidneys would transform the inactive 25-hydroxyvitamin D to the active form which is 1, 25 dihydroxyvitamin D.

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Sources of Vitamin D

A person can get vitamin D from dietary sources such as eggs, fish and milk. Sunlight can be a very good source of Vitamin D as well because when a person is exposed to the heat of the sun, vitamin D synthesis is activated thereby resulting to the production of the said vitamin. If the person has a low dietary supply of vitamin D, he or she can take vitamin D supplementation to boost the low levels in order to obtain the normal vitamin D levels in the body.

Functions of Vitamin D

Normal vitamin D levels can aid in the calcium absorption by making the bone strong and decreasing the chances of osteoporosis, cancer, and some autoimmune diseases. It also sustains the normal calcium and phosphorus levels in the blood.

Diagnostic tests for Vitamin D

The normal vitamin D levels are examined by getting the serum levels of vitamin D. The test is called 25- hydroxyvitamin D which is done by extracting the blood sample from the veins and then the specimen would be brought to the laboratory for examination. If there are normal vitamin D levels in the blood, the range would be from 20 to 56 ng per ml (50 to 140 nmol per L).  But for patients affected with cancer, the normal vitamin D levels range from 65 to 90 ng per ml.The normal vitamin D levels should not drop down to 32 ng per ml because the person would be more at risk of acquiring diseases caused by vitamin D deficiency.  However, if the vitamin D levels reach as low as 20 ng per ml, this already indicates a complication of vitamin D deficiency, and the individual may be at risk of certain types of cancer, such as prostate and breast cancer, some cardiovascular diseases and autoimmune diseases.

The person with low 25- hydroxyvitamin D levels may also have intestinal problems, or he or she is not getting enough vitamin D from dietary sources, sunlight exposure and supplementation.  On the other hand, if the person has too much 25- hydroxyvitamin D levels, then he or she has an excessive supply of vitamin D which could no longer be used.

There is another test to confirm whether the vitamin D in the body is within the normal vitamin D levels. The test is called the 1, 25 dihydroxy vitamin D. The normal vitamin D levels in 1, 25 dihydroxy vitamin D test are 10 to 75 pg per ml. If the person has low levels of 1, 25 dihydroxy vitamin D, his or her kidneys are not functioning well, thus,providing higher chances for the individual to develop  kidney diseases, or even suffer an early failure of the kidneys.

In contrast with the low levels of 1, 25 dihydroxy vitamin D, the high levels of 1, 25 dihydroxy vitamin D are a sign that the parathyroid hormone (produced by the parathyroid gland which is responsible for putting calcium into the blood if there is calcemia) is produced excessively by the parathyroid gland.

In addition to these problems caused by vitamin D deficiency, if the values go lower than the normal vitamin D levels, Rickets or deformities of the bones, and osteomalacia or the softening of the bones, may result as well.

Recommended daily allowances of Vitamin D

The recommended daily intake of Vitamin D to maintain normal Vitamin D levels varies with age.Infants and babies from 0 to 12 months of age have a recommended daily intake of 400 IU of vitamin D.  While those belonging to the age group between 1 and 70 years have a recommended daily intake of vitamin D with 600 IU a day. For those people aged 70 years old and above, they have an increased recommended daily intake of vitamin D at 800 IU.

If the normal vitamin D levels of the body are altered, the whole well-being is affected. Whether the normal vitamin D levels would go down or up erratically, there would be problems and issuesoccurringin the body. So, it is better to ensure to take in the right amount of vitamin D in order to avoid vitamin D problems.

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