Vitamin D Test | Home Vitamin D Blood Test
SKU #: H-VITD
Vitamin D Screen will show results between 20ng/mL and 100 ng/mL. Any reading below 20ng/mL will only show as <20ng/mL.
25-hydroxyvitamin D, or 25(OH)D, test measures total amount of vitamin D in your blood, both vitamin D3 and vitamin D2
What is Vitamin D?
Vitamin D is not really a vitamin at all. By definition vitamin D is a hormone because it is made in one organ (the skin), enters the bloodstream then goes into the liver and kidney to get activated. Vitamin D is the only vitamin that is also a hormone and has become more commonly known as the sunshine vitamin since your body makes vitamin D when your skin is exposed to the sun.
Vitamin D is a hormone in the group called steroid hormone family which are all hormones made from cholesterol. This group of hormones include cortisol, estrogen, progesterone, and testosterone.
Deficiency of Vitamin D
According to Dr. Michael Holick "Vitamin D deficiency is epidemic throughout the USA, through all age groups." Some experts estimate that 70% of the population of the USA and Canada are vitamin D deficient.
Vitamin D deficiency is more common in women, people of color, obese people, senior citizens and breast-fed infants.
The symptoms that can appear from a vitamin d deficiency are:
Vitamin D Testing
The most accurate way to measure how much vitamin D is in your body is the 25-hydroxy vitamin D test or 25(OH)D test. Vitamin D changes into an active form of the vitamin in the kidney and can be measured through a blood test. The normal range is 30.0 to 74.0 nanograms per milliliter (ng/mL). A lower level indicates vitamin D deficiency, which you should discuss with your doctor. A level below 30 is insufficient vitamin D and a level below 20 is considered deficient.
More recent research in the vitamin D deficiency epidemic is suggesting that levels below 50ng/mL are now considered insufficient and levels below 25 are deficient. As more research on vitamin D continues and the National Institute of Health (NIH) reviews the data, these recommended levels could change.
According to the Vitamin D Council, a nonprofit group whose goal is to education the public about vitamin d defiency, recommends a year round level above 50ng/mL. Our vitamin D levels fluctuate based on sun exposure and your level will probably be highest at the end of the summer and lowest at the end of winter.
The Vitamin D Council also recommends testing your vitamin D level again in 3 months if you were found to be insufficient or deficient on your first test. You can make changes in your sun exposure to increase your bodies production of vitamin D and/or take vitamin D supplements. If you test again in three months you will find out if you have eliminated your vitamin D deficiency.
Vitamin D - The Sunshine Vitamin
The good news about vitamin D is the best source is the sun. As a culture we have been warned about sun exposure and told to always wear a sunblock which is possibly one of the reasons we now have epidemic levels of vitamin D deficiency. Our modern technological lifestyles mean we are indoors most often and typically not outdoors during the prime hours of 10am - 2pm when the sun is primed to help us produce vitamin D. Most people would need approxiamately 10-20 minutes in the sun with your arms and legs exposed (not your face) two to three times a week, however the estimated amount will vary based on your skin type and your geographical location.
Vitamin D Food Sources
Very few foods in nature contain vitamin D, making it difficult to get the needed amount of vitamin D from your diet. The most known sources are flesh of fish (such as salmon, tuna, and mackerel) and fish liver oils. According to Dr. Holick you would have to eat oily fish like salmon and mackeral 3-5 times a week to get your vitamin D requirement. Milk and orange juice are fortified with vitamin D, but you would have to drink 10 glasses per day of either to get your needed vitamin D.
Vitamin D and Disease Prevention
A 2008 study that was published in the American Medical Association's Archives of Internal Medicine was able to show that the risk of death from all causes can be decreased by 26 percent with vitamin D supplementation. The study tracked 13,331 healthy people for nine years and correlated their causes of death and their vitamin D levels - it was found that those with the highest levels of vitamin D had a 26 percent lower chance of dying. The researchers said "Our results make it much more clear that all men and women concerned about thier overall health should more closely monitor their blood levels of vitamin D, and make sure they have enough."
Research has shown that the following diseases and conditions may be linked to low vitamin D levels or vitamin D may help reduce the symptoms of:
Read more about vitamin D on our blog: What is the optimal vitamin D level?
Read complete test instructions Vitamin D Test Instructions
View a sample lab report Vitamin D Test Lab Results
1. Print name and date on the AdvanceDx100 sample card
2. Wash hands with warm water and dry thoroughly
3. Twist off yellow tip from lancet and hold lancet steady, press down until it clicks then release
4. Drip blood from fingertip to fill the box on collection card - about 4 drops
5. Allow collection card to air dry for 30 minutes
6. After card is dry, tear open blood sample return bag and insert card and seal. DO NOT remove the desiccant from the blood sample return bag.
7. Fill out the Requisition/Consent Form and make sure you note the name, date of birth and phone number that you put on the form, you will need that EXACT information in order to get your test results. Place form and the sealed blood sample return bag and place in preaddressed, prepaid mailing envelope
8. Test results will be available after lab processing (7-10 days) on http://www.mybloodtestresult.com. If you are unable to retrieve your test results, you must call the lab directly at 847-537-9600 between 9am-4pm CST.
Q. Can you receive vitamin D from sunlight through windows?
Q. What time of day is best for sun exposure to make vitamin D?
Q. If I shower after being in the sun, will I wash the vitamin D off of my skin?
Q. If almost everyone is vitamin D deficient, why should I test at all?
Q: Can I have my results sent to my doctor's or business' address instead of my home address?
A: Yes, results can be sent to your doctor's office, or to your business, or to your wellness clinic. Only one mailing is included in the price of the kit, if required duplicate copies must be self-produced.
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