Hello I want to know difference about vitamin d total test and vitamin d profile test in which test vitamin d2, d3 test includes.

Dr. Sajeev KumarGeneral Physician34yrs exp

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The most accurate way to measure how much vitamin d is in your body is the 25-hydroxy vitamin d blood test. A level of 20 nanograms/milliliter to 50 ng/ml is considered adequate for healthy people. A level less than 12 ng/ml indicates vitamin d deficiency vitamin d is an essential compound required for proper growth and development of teeth and bones. There are two forms of vitamin d that can be measured in blood. They are 25-hydroxyvitamin d and 1, 25- dihydroxyvitamin d. The two sources of vitamin d is endogenous or exogenous. Endogenous sources are produced in the skin by the exposure to sunlight. The exogenous sources are through food and supplements. Vitamin d2 and vitamin d3 are the two chemical structures of the vitamin d. Vitamin d2 is called ergocalciferol which is mostly found in fortified foods and most vitamin preparations and supplements. Vitamin d3 is called cholecalciferol and is produced in the body and also used in some supplements. These two vitamin d2 and vitamin d3 are converted to 1, 25-dihydroxy vitamin d. Hope it is clear. In one wprd, the vitamin d profile measures both forms of vitamin d whereas in the vitamin d test only the total of both are calculated or conveyed.  

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