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Vitamin D is a fat-soluble vitamin. These types of vitamins are stored in the body's liver and fatty tissues.
Vitamin D acts as both a vitamin and a hormone. It is found in some foods, but the main sources are vitamin D-fortified milk and sunlight.
Vitamin D plays a role in the growth and maintenance of strong, healthy bones. It also helps to maintain normal blood levels of calcium and phosphorus.
Here are the guidelines for vitamin D intake:
|Age Group||Recommended Dietary Allowance or Adequate Intake (IU/Day)|
|Pregnant or nursing women||600|
Symptoms of severe vitamin D deficiency are rare today, but can lead to:
Mild deficiency is common, especially in places that have less sunlight.
Vitamin D is stored in the body and does not pass out through urine. It can build up and reach toxic levels. Here are safe upper level intakes for vitamin D:
|Age Group||Upper Level Intake (IU/Day)|
|9 years and older||4,000|
|Pregnant or nursing women||4,000|
IU: international units
Symptoms of toxicity are:
Sunlight and diet are not likely to cause vitamin D toxicity.
Fortified foods have the most vitamin D. Examples of foods that may be fortified with vitamin D are:
There are not many foods that are natural sources of vitamin D. They are:
Vitamin D deficiency is more common in:
Here are tips to help raise your intake:
Eat Right—Academy of Nutrition and Dietetics
Office of Dietary Supplements—National Institutes of Health
Calcium and vitamin D for treatment and prevention of osteoporosis. EBSCO DynaMed website. Available at:https://www.dynamed.com/management/calcium-and-vitamin-d-for-treatment-and-prevention-of-osteoporosis. Updated February 4, 2020. Accessed February 6, 2020.
Vitamin D. Office of Dietary Supplements website. Available at: https://ods.od.nih.gov/factsheets/VitaminD-HealthProfessional. Updated August 7, 2019. Accessed February 6, 2020.
Vitamin D and skin health. Oregon State University Linus Pauling Institute website. Available at: http://lpi.oregonstate.edu/mic/micronutrients-health/skin-health/nutrient-index/vitamin-D. Accessed February 6, 2020.
Vitamin D intake and supplementation. EBSCO DynaMed website. Available at:https://www.dynamed.com/drug-review/vitamin-d-intake-and-supplementation. Updated November 26, 2018. Accessed February 6, 2020.
Last reviewed November 2019 by EBSCO Medical Review Board Dianne Scheinberg Rishikof MS, RD, LDN Last Updated: 2/2/2021