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Vitamin D benefit
Vitamin D benefit


Vitamin D deficit
Vitamin D deficit


Vitamin D source
Vitamin D source


Definition:

Vitamin D is a fat-soluble vitamin that helps the body absorb calcium. Fat-soluble vitamins are stored in the body's fatty tissue.



Alternative Names:

Cholecalciferol



Function:

In addition to helping the body absorb calcium , vitamin D also helps the body keep the right amount of calcium and phosphorus in the blood.



Food Sources:

Vitamin D is found in the following foods:

  • Dairy products
    • Cheese
    • Butter
    • Cream
    • Fortified milk (all milk in the U.S. is fortified with vitamin D)
  • Fish
  • Oysters
  • Fortified cereals
  • Margarine


Side Effects:

Vitamin D deficiency can lead to osteoporosis in adults or rickets in children.

Too much vitamin D can make the intestines absorb too much calcium. This may cause high levels of calcium in the blood. High blood calcium can lead to calcium deposits in soft tissues such as the heart and lungs. This can reduce their ability to function.

Kidney stones , vomiting , and muscle weakness may also occur if you have too much vitamin D.



Recommendations:

Vitamin D is also known as the "sunshine vitamin" because the body manufactures the vitamin after being exposed to sunshine. Ten to 15 minutes of sunshine 3 times weekly is enough to produce the body's requirement of vitamin D. However, many people living in sunny climates still do not make enough vitamin D and need more from their diet or supplementation.

The Food and Nutrition Board at the Institute of Medicine recommends the following dietary intake for vitamin D as cholecalciferol. (One microgram of cholecalciferol is the same as 40 IU of vitamin D.)

Infants

  • 0 - 6 months: 5 micrograms per day (mcg/day)
  • 7 - 12 months: 5 mcg/day

Children

  • 1 - 13 years: 5 mcg/day

Adolescents and Adults

  • Males and Females age 14 to 50: 5 mcg/day
  • Males and Females age 51 to 70: 10 mcg/day
  • Males and Females age over 70: 15 mcg/day

Specific recommendations for each vitamin depend on age, gender, and other factors (such as pregnancy). In general, those over age 50 need higher amounts of vitamin D than younger persons. Ask your health care provider which amount is best for you.



References:

Hamrick I, Counts SH. Vitamin and mineral supplements. Wellness and Prevention. December 2008:35(4);729-747.

Rakel D, ed. Integrative Medicine. 2nd ed. Philadelphia, Pa: Saunders Elsevier; 2007.

Mason JB. Vitamins, trace minerals, and other micronutrients. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 237.

Institute of Medicine. Food and Nutrition Board. Dietary Reference Intakes for Calcium, Phosphorous, Magnesium, Vitamin D, and Fluoride. National Academy Press, Washington, DC, 1997.




Review Date: 3/7/2009
Reviewed By: Linda Vorvick, MD, Family Physician, Seattle Site Coordinator, Lecturer, Pathophysiology, MEDEX Northwest Division of Physician Assistant Studies, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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