The amount of vitamin d in the body is said to be abnormal when it is lower or higher than the normal vitamin d levels. The results of the blood test can tell you whether youre getting too little too much or the right amount of vitamin d.
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Tests for vitamin d deficiency.
What is a normal vitamin d level in the blood. So what is the current cutoff value at which people are considered low and thus at risk for developing bone thinning and having fractures. The blood test that measures vitamin d is called a 25ohd blood test. According to the institute of medicine the optimum range of 25 hydroxy vitamin d in the blood is 20 to 50 nanograms per milliliter abbreviated ngml.
In blood tests the accepted normal range for vitamin d levels runs from 20 to 50 nanograms per milliliter says webmd. The national institutes of health reports that the 25 hydroxy vitamin d test is the most accurate measuring tool for determining whether you have enough vitamin d in your system. It is unclear when vitamin d supplementation should be prescribed.
Over the past few decades the normal blood level of vitamin d 25 oh vitamin d was based on the amount needed to keep pth from becoming abnormally high. In fact there are multiple agencies all with slightly different opinions on what levels are deficient insufficient sufficient high or toxic. A low level of vitamin d is a strong indication that the person has inadequate amounts of vitamin d and is at high risk of developing life threatening heart diseases.
Evidence of links between. The most accurate way to measure how much vitamin d is in your body is the 25 hydroxy vitamin d blood test. Again pth at high levels can cause calcium loss from the bone so this would make sense that vitamin d could maintain or improve bone health at these.
People with a body mass index of 30 or greater often have low blood levels of vitamin d. Vitamin d deficiency is thought to be common in australia. We are talking about the blood level of 25 hydroxy vitamin d which is usually measured in nanograms per milliliter ah.
Vitamin d assays are inconsistent and inaccurate and there is weak evidence around the level of 25 hydroxyvitamin d 25ohd that is optimal. Pinpointing a healthy vitamin d level is tricky. A level of 20 nanogramsmilliliter to 50 ngml is considered adequate for healthy people.
Historically a normal nutritional vitamin d status has been defined as just about any circulating level of vitamin d 25 hydroxy in asymptomatic subjects and you dont want to have a low or even normal vitamin d blood test you want to have an optimal vitamin d 25 hydroxy level. If you have ever had your level of vitamin d tested depending on which lab you used your report showing whether your level is low normal or high might have left you scratching your head. If you have had your vitamin d levels tested its important to understand what the results mean and what action you might need to take.
A person with less than 12 nanograms per milliliter has a deficiency. Nevertheless there is no medical consensus about what vitamin d level is necessary for optimal human health. The ideal vitamin d blood level.
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