People at higher risk of deficiency include the elderly or obese people, people who don't get enough sun exposure, people with darker skin, and people who take certain medications for long periods of time. wanjie evaluation Do not eat or drink (other than water) for 10 to 12 hours before the test. All Rights Reserved | The FDA updated the RDV guidelines only once since World War II. Your body needs essential micronutrients (vitamins and minerals) and macronutrients (carbohydrates, protein, and fat) to function. Here are three common causes of a nutrient deficiency: If you are eating a poor diet with lots of processed food, refined sugars, and white flours then your meals are completely devoid of nutrients your body needs to balance your mood. June 27th, 2022 Available online at http://www.mayomedicallaboratories.com/articles/vitamind/index.html. There are several risk factors for this anemia, such as those who have had stomach or intestinal surgery, small intestine problems, or people with a family history of this anemia. Available online at http://emedicine.medscape.com/article/128762-overview. In rare cases, the vein may become swollen after the blood sample is taken. Updated on: The main role of vitamin D is to help regulate blood levels of calcium, phosphorus, and (to a lesser extent) magnesium. Help find the cause of a decrease in mental abilities or other nervous system symptoms, such as tingling or numbness of the arms or legs (, See if vitamin B12 deficiency anemia is present after a person has been diagnosed with. Vitamin B12 is found in animal products such as meat, shellfish, milk, cheese, and eggs. Consent is not a condition of any purchase. at the LSU Health Science Center, and completed her Emergency Medicine residency at the University of Maryland Medical Center. However, the ODI recommendation for vitamin C is 1,000 mg. Heres a look at the differences in the amounts recommended by the ODI and the RDV: Now that you understand the differences between optimal amounts and the recommended daily value, lets discuss how to know if you have a vitamin deficiency. [On-line information]. Check for vitamin B12 deficiency anemia. Thats because the FDA allows a 20% margin of error on the nutrients reported on the nutrition facts panel, which could mean youre only getting 80% when the label says 100%. Vitamin D, 25-Hydroxy, Test Directory (online information). A warm compress can be used several times a day to treat this. J Clin Endocrinol Metab, 96(7): 1911 (July 1, 2011). Put a gauze pad or cotton ball over the needle site as the needle is removed. Labs & Appointments Toggle Labs & Appointments, Billing & Insurance Toggle Billing & Insurance, Browse Health Resources Toggle Browse Health Resources, Labcorp OnDemand Testing Toggle Labcorp OnDemand Testing, Find Clinical Trials Toggle Find Clinical Trials, Testing by Disease & Condition Toggle Testing by Disease & Condition, Testing & Services For Toggle Testing & Services For, Hospitals & Physician Systems Toggle Hospitals & Physician Systems, Managed Care Health Plans Toggle Managed Care Health Plans, Lab Data Integrations & Tools Toggle Lab Data Integrations & Tools, Employee Wellness & Testing Toggle Employee Wellness & Testing, Government & Education Toggle Government & Education, Therapeutic Indications Toggle Therapeutic Indications, Development Phase Toggle Development Phase, Compounds & Molecules Toggle Compounds & Molecules, To determine if you have a vitamin D deficiency; if you are receiving vitamin D supplementation, to determine if it is adequate, When you have an abnormal calcium, phosphorus, and/or parathyroid hormone level; when you have evidence of bone disease or bone weakness; when you are at high risk of deficiency or a healthcare practitioner suspects that you might have a vitamin D deficiency; prior to starting drug treatment for osteoporosis; periodically to monitor treatment of vitamin D deficiency, A blood sample drawn from a vein in your arm. Prevention, Vitamin D. Available online at http://www.nof.org/prevention/vitaminD.htm. Please be advised that this information is made available to assist our patients to learn more about their health. Vitamin deficiencies in biotin, niacin, and zinc can lead to hair loss. Here are some common symptoms of nutrient deficiencies that could indicate you should do a nutrition test: Sores and cracks in or around the mouth are often caused by a deficiency in one or more nutrients. Miller-Keane Medical Dictionary (2000). Furthermore, while modern agriculture has increased the food supply, making more food available for more people, that process has also stripped the nutrients from the soil where our food grows. Older adults, people who are institutionalized or homebound and/or have limited sun exposure, those who are obese, who have undergone gastric bypass surgery, and/or who have fat malabsorption are at an increased risk of a vitamin D deficiency. Consent is not a condition of any purchase. Amy Myers, MD is a two-time New York Times bestselling author and an internationally acclaimed functional medicine physician. 8816 Cullen Ln, Austin, TX 78748, 2016-2022 AMMD, LLC (AmyMyersMD.com). NIH (2001 August 07, Updated). Available online at http://emedicine.medscape.com/article/128762-overview#a6. In the same way, your body needs to have all the nutritional supplements, vitamins and minerals to make the hormones, proteins, cofactors, and other vital body processes. The Endocrine Society defines vitamin D deficiency as a 25-hydroxyvitamin D blood level below 20 ng/mL (50 nmol/liter) and vitamin D insufficiency as a level between 2129 ng/mL (52.572.5 nmol/liter). Vitamin D Insufficiency. Mosby's Diagnostic and Laboratory Test Reference 10th Edition: Mosby, Inc., Saint Louis, MO. Content on this website is not considered medical advice. Orthopedic and Sports Medicine Specialists. Since absorption of calcium is dependent on vitamin D, many manufacturers of calcium supplements add vitamin D to assure optimal calcium uptake. Even if you read labels and believe youre getting the appropriate nutrients each day, you could be wrong. Available online at http://www.nlm.nih.gov/medlineplus/ency/article/002405.htm. VDR mutations can lead to vitamin D deficiency. Clinical Diagnosis and Management by Laboratory Methods. Quantification of Serum 25-Hydroxyvitamin D2 and D3 Using HPLC-Tandem Mass Spectrometry and Examination of Reference Intervals for Diagnosis of Vitamin D Deficiency. All Rights Reserved. Wrap an elastic band around your upper arm to stop the flow of blood. Thats part of the reason I advocate buying fresh, organic produce whenever possible. Put pressure on the site and then put on a bandage. 21st ed. Join The Myers Way movement that has helped over 1.2 MILLION people in 120+ countries. New Recommended Daily Amounts of Calcium and Vitamin D. Available online at https://www.nlm.nih.gov/medlineplus/magazine/issues/winter11/articles/winter11pg12.html. Thomas, Clayton L., Editor (1997). Vitamin D is a family of compounds that is essential for the proper growth and formation of teeth and bones. Message frequency varies. Also included in this group are people with darker skin and breastfed infants. An unhealthy diet, environmental toxins, certain medications, and stress can all lead to leaky gut. I made sure to include optimal levels of B Vitamins that far exceed the USDAs recommended daily value (RDV). Our Health Library information does not replace the advice of a doctor. Available online at http://www8.nationalacademies.org/onpinews/newsitem.aspx?RecordID=13050. These other functions have implicated vitamin D in other disorders, such as autoimmunity and cancer. New York: Saunders: 2006. Pagana, K. D. & Pagana, T. J. Statements made on this website have not been evaluated by the Food and Drug Administration. However, your nutrient deficiency could be caused by your diet, autoimmune disease, or genetics. Most people who eat animal products are not likely to develop vitamin B12 deficiency anemia unless their bodies can't absorb it from food. Amy Myers MD. The Wellness & Aesthetics Medical Center540 Oak Centre Dr, Suite 114San Antonio, TX 78258Phone: (210) 985-1700. This test measures the level of vitamin D in the blood. When I custom formulated The Myers Way Multivitamin, I poured over a decade of research into selecting the nutrient forms that work best with your body. Vitamin D Status, United States, 2001-2006. This makes the veins below the band larger so it is easier to put a needle into the vein. Thats why The Myers Way Multivitamin was the first supplement I personally formulated. Merck Manual for Healthcare Professionals [On-line information]. E. Gregory Thompson MD - Internal Medicine, Medical Tests: Questions to Ask the Doctor. Did you know that your body may be missing pertinent vitamins and nutrients it needs to function optimally? Taking certain medicines that might affect your test results. Hypervitaminosis D. MedlinePlus Medical Encyclopedia [On-line information]. As a result, your body cant absorb foods properly, leading to vitamin and mineral deficiencies, inflammation, health problems, and mood imbalances. Henry JB, ed. Vitamin D3 is the form produced in the body and is also used in some supplements. Compare the supplement facts label of The Myers Way Multivitamin with others and you will see for yourself the higher levels of key nutrients designed to support overall general wellness and detoxification. December 27th, 2021. Accessed February 2013. The ODI was developed to establish the amount of vitamins and minerals your body needs to function optimally. Vitamin D. MedlinePlus Health Information, Medical Encyclopedia [On-line information]. Available online at http://emedicine.medscape.com/article/2088672-overview#showall. Shes a 2x New York Times bestselling author, and the founder and CEO of the health & lifestyle e-commerce brand, Amy Myers MD. SIBO Symptoms, Causes, Testing & Diagnosis, 4 Essential Supplements Everyone Should Take. Occasionally, drugs used to treat seizures, particularly phenytoin (Dilantin), can interfere with the production of 25-hydroxyvitamin D in the liver. A low blood level of 25-hydroxyvitamin D may mean that a person is not getting enough exposure to sunlight or enough dietary vitamin D to meet his or her body's demand or that there is a problem with its absorption from the intestines. Strict vegetarians (vegans) who do not eat animal products and babies of mothers who are strict vegetarians are at increased risk for developing anemia and should take a supplement containing vitamin B12. Amy Myers, M.D. Vitamin D Home Page. Thats why I recommend going by the Optimal Daily Intake when looking at a nutrition test result to determine your vitamin deficiency. A high level of 25-hydroxyvitamin D usually reflects excess supplementation from vitamin pills or other nutritional supplements. Pp 1040-1043. Terms & Conditions | A methylmalonic acid (MMA) blood test may be done to help evaluate vitamin B12 test results. When the button is activated, it will update the address field with your current whereabouts, Federally Qualified Health Centers (FQHCs), NIH Office of Dietary Supplements: Vitamin D Fact Sheet for Consumers, MedlinePlus Medical Encyclopedia: Vitamin D, Harvard School of Public Health: Vitamin D and Health, Combatting Modern Slavery and Human Trafficking Statement, Determine if bone weakness, bone malformation, or abnormal metabolism of calcium (reflected by abnormal, Help diagnose or monitor problems with parathyroid gland functioning since PTH is essential for vitamin D activation, Screen people who are at high risk of deficiency, as recommended by the National Osteoporosis Foundation, the Institute of Medicine, and the Endocrine Society, Help monitor the health status of individuals with diseases that interfere with fat absorption, such as cystic fibrosis and Crohn disease, since vitamin D is a fat-soluble vitamin and is absorbed from the intestine like a fat, Monitor people who have had gastric bypass surgery and may not be able to absorb enough vitamin D, Help determine the effectiveness of treatment when vitamin D, calcium, phosphorus, and/or magnesium supplementation is prescribed. UNRAVELING THE ENIGMA OF VITAMIN D. The National Academies, National Academy of Sciences Beyond Discovery, The path from research to human benefit [On-line Journal]. 1101500 picograms per milliliter (pg/mL), 811107 picomoles per liter (pmol/L) (SI units). Pp 529-530. The Food and Drug Administration (FDA) developed the Recommended Daily Value (RDV) for certain vitamins and minerals during World War II to ensure Americans were getting the minimum amount needed to avoid illness during food rations. Copyright 2022 Orthopedic and Sports Medicine Specialists | Privacy Policy | Photo DisclaimerOrthopedic Web Design by Practis. This is called the dilution effect.2. We're Open - Important COVID-19 Information, 540 Oak Centre Dr, Suite 114 San Antonio, TX 78258. Contemporary Practice in Clinical Chemistry 2nd Edition: AACC Press, Washington, DC. Vitamin D Deficiency and Related Disorders. Medscape Reference. The amount of vitamin D produced by the body may be insufficient, especially when there is limited exposure to sunlight and routine use of sunscreens. Fortification of milk and infant formula has been a real success story in the United States, drastically reducing the rate of juvenile rickets and making it a relatively rare occurrence. Published on: Do Not Sell My Personal Information. WebMDHealth, Dictionary [On-line information]. Since dietary vitamin D is found naturally only in a few foods, such as cod liver oil, dietary intake would not be sufficient for most people. However, your body needs up to 2,000 mg of vitamin C to function optimally.3. If you have adequate amounts of vitamin D from other sources, the additional vitamin D is not necessary. The Merck Manual of Medical Information--Home Edition [On-line information]. When calcium is low and/or a person has symptoms of vitamin D deficiency, such as bone malformation in children (rickets) and bone weakness, softness, or fracture in adults (osteomalacia), 25-hydroxyvitamin D usually is ordered to identify a possible deficiency in vitamin D. The test may be requested when an individual is known to be at risk of vitamin D deficiency. Excessive fatigue and exhaustion are common symptoms of a vitamin D deficiency. Vitamin D3 1,25-Dihydroxyvitamin D. Medscape Reference. High levels of protein in the blood, such as from. 1995-2022 Healthwise, Incorporated. We utilize individualized measurements of vitamins, nutrients, and minerals to ensure superior results for our patients. Accessed February 2009. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated. PLUS youll get occasional offers and text only savings delivered right to your phone. Medical treatments for male and female pattern hair loss. MedlinePlus Medical Encyclopedia [On-line information]. Accessed February 2013. Available online at http://www.orst.edu/dept/lpi/infocenter/vitamins/vitaminD/. Available online at http://www.nlm.nih.gov/medlineplus/ency/article/001594.htm. Accessed July 9, 2016. Dr. Myers retired from her functional medicine clinic, Austin UltraHealth, where she served thousands of patients, to empower those who were failed by conventional medicine. To better serve you at the time of your appointment, please download and complete patient forms. Having pernicious anemia, which means you lack the substance (intrinsic factor) needed to absorb vitamin B12. These ranges vary from lab to lab, and your lab may have a different range for what's normal. Medscape. A biotin deficiency can also cause muscle cramps, muscle pain, and tingling in the hands and feet. A change in homocysteine levels may also affect a change in vitamin B12 levels because of. Based on data from the National Health and Nutrition Examination Survey, the Centers for Disease Control and Prevention (CDC) reports that two-thirds of U.S. population has sufficient vitamin D, while roughly one-quarter are at risk of inadequate vitamin D and 8% are at risk of deficiency, as defined by the Dietary Reference Intake (DRI) set by the Institute of Medicine. Healthwise, Incorporated disclaims any warranty or liability for your use of this information. Remove the band from your arm when enough blood is collected. Maybe. Mosby's Diagnostic and Laboratory Test Reference 5th Edition: Mosby, Inc., Saint Louis, MO. This is because our body needs vitamin A to create rhodopsin, a pigment found in our retina that helps us see in low light or at night.9. It may feel tight. [On-line information]. Research is being done in other areas, including the potential use of vitamin D to help control autoimmune conditions. Many essential foods lack vitamin D. Your body can create its own vitamin D from UV rays from the sun. The gold standard for testing for nutrient deficiencies is a full panel nutrition blood test, which includes a Complete Blood Count (CBC) and a Total Iron Binding Capacity (TIBC) test. Vitamins and minerals perform several functions in our bodies. Also, your doctor will evaluate your results based on your health and other factors. Methylmalonic acid is a substance in the blood that increases when vitamin B12 levels decrease. Accessed March 2010. If you tried to bake a cake and had no floor you could not make a cake. Your information is secure and is handled in accordance with our privacy policy. Evaluation, treatment, and prevention of vitamin D deficiency: An Endocrine Society clinical practice guideline. Johnson, L. (Revised 2012 December). Consider that the RDV for vitamin C is 65 to 90 milligrams per day. B and C vitamins are water-soluble, meaning your body uses what it needs and removes the rest through your urine. Mayo Clinic Mayo Medical Laboratories Communique. One of the best ways to ensure you are getting optimal amounts of the vitamins and minerals your body needs is by taking a high-quality multivitamin. An estimated 50% of adults report hair loss by the time they reach age 50. The body needs this B vitamin to make blood cells and to maintain a healthy nervous system. DeLuca, H. (2001 January 18, Updated). (2009). Heres a look at what each vitamin supports in your body: We get these through our food, however you cannot get optimal amounts of these nutrients from food alone. Taber's Cyclopedic Medical Dictionary. And of course, I dont include any of the added sugars or colorings you might find in other multivitamins. al (2001). For example, based on the RDV you should get 90 milligrams of vitamin C every day. Your body cannot make its own vitamin C, so it must be obtained through your diet or supplement regimen. IOM Report Sets New Dietary Intake Levels for Calcium and Vitamin D To Maintain Health and Avoid Risks Associated With Excess. I recommend virtually everyone take a daily multivitamin that contains a combination of micronutrients, including vitamins, minerals, and antioxidants. (June 2011) Holick, N. et al. Holick MF et al. Finally, I included bioavailable Vitamin D3 in The Myers Way Multivitamin which is not only critical to support bone health, it can also promote a healthy immune system. Sign up for text messages below and youll be sent a special code for $10 OFF anything in the Amy Myers MD store (thats right, anything). ( 2011). Two forms of vitamin D can be measured in the blood, 25-hydroxyvitamin D and 1,25-dihydroxyvitamin D. The 25-hydroxyvitamin D is the major formfound in the blood and is the relatively inactive precursor to the active hormone, 1,25-dihydroxyvitamin D. Because of its long half-life and higher concentration, 25-hydroxyvitamin D is commonly measured to assess and monitor vitamin D status in individuals. Accessed July 9, 2016. Available online at http://www.iom.edu/Reports/2010/Dietary-Reference-Intakes-for-Calcium-and-Vitamin-D/DRI-Values.aspx. When was the last time you asked your doctor for a nutrition test, a measurement of the levels of vitamins and minerals in your blood? Unlike many other multivitamins on the market today, The Myers Way Multivitamin has optimal levels of selenium, zinc, and iodine to support thyroid health and contains 100% of the folate you need each day. Vitamin D has also been shown to influence the growth and differentiation of many other tissues and to help regulate the immune system. This is especially important for those with MTHFR mutations who want to optimize detoxification and methylation. Ill talk more about nutrient deficiencies later. There is very little chance of a problem from having a blood sample taken from a vein. Other symptoms of a vitamin C deficiency include bruising, delayed wound healing, and dry skin.8, We know that vitamin A supports vision health. Im going to tell you the difference between the RDV and ODI, the signs of a nutrient deficiency, and everyone should take a multivitamin that contains optimal levels of essential vitamins and minerals. Correcting these deficiencies can prevent or slow down hair loss. Declining Fruit and Vegetable Nutrient Composition: What Is the Evidence? Available online at http://www.questdiagnostics.com/hcp/topics/endo/vitamin_d.html. Available online at http://www.cc.nih.gov/ccc/supplements/vitd.html. All information presented in this website is intended for informational purposes only and not for the purpose of rendering medical advice. Conlan, R. & Sherman, E., et. Evaluation, Treatment and Prevention of Vitamin D Deficiency: an Endocrine Society Clinical Practice Guideline. 1,25-dihydroxyvitamin D Or that a deficiency in these nutrients can lead to contraction of a virus? As I mentioned earlier, micronutrients are needed in small amounts, whereas macronutrients are needed in larger amounts. Accessed February 2013. First, lets talk about why you need vitamins and minerals. Privacy Policy | With a visit to The Wellness and Aesthetics Medical Center, you can correct these deficiencies and begin living with a higher quality of life. Clinical Chemistry 2008 Aug; 54(8): 1283-9. Mouth sores and ulcers are linked to a deficiency in B vitamins like thiamine (B1), riboflavin (B2),6 or pyridoxine (B6). Available online at http://emedicine.medscape.com/article/2088694-overview#showall. Available online at http://press.endocrine.org/doi/full/10.1210/jc.2011-0385. Customized vitamin therapy is important, since each individual has unique body requirements and different nutritional needs. Merck. The U.S. Institute of Medicine has concluded that a 25-hydroxyvitamin D level of 20 ng/mL (50 nmol/liter) or above is adequate for bone health, and that levels greater than 30 ng/mL do not offer significantly better effects. The normal values listed herecalled a reference rangeare just a guide. Put the needle into the vein. The idea of Optimal Daily Intake has been around since before the RDV was developed.4 However, it was first established and utilized in the 1990s. Available online at http://www.aruplab.com/guides/ug/tests/0070277.jsp. However, these guidelines are set at values calculated at just one milligram over the minimum amount you need to avoid illness. Your lab report should contain the range your lab uses. High levels of vitamin D and calcium can lead to the calcification and damage to organs, particularly the kidneys and blood vessels. F.A. If you want to test your nutrient levels at home, I recommend using a home micronutrient test fromLetsGetChecked. An elastic band is wrapped around your upper arm. Our providers may not see and/or treat all topics found herein. 25-hydroxyvitamin D It depends on your age and sex. (2011 September). Oltikar, A. Vitamin B12 is usually measured at the same time as a folic acid test, because a lack of either one or both can lead to a form of anemia called megaloblastic anemia. Message and data rates may apply. Nguyen, H. and Chernoff, A. Nguyen, H. and Chernoff, A. 2022 Laboratory Corporation of America Holdings. Available online at http://dx.doi.org/10.1210/jc.2011-0385. The good news is, a nutrient-rich diet can help slow or prevent hair loss. Learn how we develop our content. This problem is called phlebitis. Although there are differences among vitamin D methods, most laboratories utilize similar reference intervals. By sharing your phone number, you agree to receive marketing text messages from (Amy Myers MD) at the number provided, including messages sent by autodialer. Vitamin B12 is stored in the liver for a year or more, which reduces a person's risk of anemia. Available online at http://www.mayomedicallaboratories.com/articles/communique/2011/09.html. Diagnose the cause of certain types of anemia, such as megaloblastic anemia. American Journal of Clinical Pathology 2006;125:914-920. Reply HELP for help or STOP to cancel. High levels of vitamin B12 can occur in liver disease (such as, In rare cases, high levels may be found in people with, Low levels of vitamin B12 may mean you have. If you dont have enough of them, you can develop a nutrient deficiency. Accessed February 2013. Inflammatory foods, such as gluten and dairy, grains and legumes, sugar, eggs, caffeine, nuts, seeds, and nightshades can cause leaky gut, which leads to poor nutrient absorption and health problems. You might believe you are getting enough vitamins and minerals if you are going by the label on your food. Remember that each nutrient deficiency has its own set of symptoms, so its always a good idea to have your doctor do a nutrition test to determine if your nutrient levels are optimal. The amount of vitamin D in these tablets is not likely to lead to excess vitamin D or be harmful either. Mutations that control sulfation can lead to low zinc levels. (Feb 2016) University of Maryland Medical Center. Vitamin D Fact Sheet for Health Professionals. Journal of Clinical Endocrinology & Metabolism. In addition, she is a wife, mother, and the successful founder and CEO of Amy Myers MD. This information does not replace the advice of a doctor. Accessed March 2013. By sharing your phone number, you agree to receive marketing text messages from (Amy Myers MD) at the number provided, including messages sent by autodialer. Davis Company, Philadelphia, PA [18th Edition]. Attach a tube to the needle to fill it with blood. Nutrient insufficiencies are much more common than youd think. Tangpricha, V. and Khazai, N. (Updated 2012 December 10). In fact, studies show these insufficiencies affect about 40% of all American adults. IMPORTANT! In leaky gut, tiny holes in your gut lining allow food particles, bacteria, yeast, and viruses to enter your bloodstream. (2001 February 09). A high level of 1,25-dihydroxyvitamin D may occur when there is excess parathryoid hormone or when there are diseases, such as sarcoidosis or some lymphomas, that can make 1,25-dihydroxyvitamin D outside of the kidneys. (Updated 2012 April 20). Vitamin D. NIH Clinical Center, National Institutes of Health. Still, even if you eat all organic foods you likely still arent getting optimal amounts of vitamins and minerals. November 29, 2021, Author: Healthwise Staff Medical Review: E. Gregory Thompson MD - Internal Medicine Adam Husney MD - Family Medicine Martin J. Gabica MD - Family Medicine, Medical Review:E. Gregory Thompson MD - Internal Medicine & Adam Husney MD - Family Medicine & Martin J. Gabica MD - Family Medicine. Accessed February 2013. Our Centers of Excellence offer the best in patient care. Reasons you may not be able to have the test or why the results may not be helpful include: Current as of: Vitamins and minerals are micronutrients that you need in tiny amounts. Return Guarantee & Shipping Info | Dr. Myers specializes in empowering those with autoimmune, thyroid, and digestive issues to reverse their conditions and take back their health. National Osteoporosis Foundation. Available online at http://vitamind.ucr.edu/about.html. For example, vitamin A supports your immune system and eye health. Vitamin D Testing. Please see a physician before making any medical or lifestyle changes. [On-line information]. Available online at http://my.webmd.com/content/asset/miller_keane_35600. 25-hydroxyvitamin D Accessed March 2010. People who do not have adequate sun exposure may obtain the vitamin D that they need from food sources or supplements.