This weeks chapter in my Nutrition class is Vitamins. I still have to read the whole chapter, but here is what the power point from the class says about Vitamin D.
10 minutes of sun exposure a week can give you your needs through the formation of provitamin D.
Functions of Vitamin D:
Metabolism regulation
The maintenance of a healthy brain, pancreas, and pituitary gland relies on an adequate supply of vitamin D.
Parathyroid gland produces parathyroid hormone (helps with blood calcium balance). The parathyroid hormone is reliant upon adequate vitamin D.
Calcium balance in the body
Vitamin D is needed for the proper absorption of calcium and deposition of calcium and phosphorus on bones.
Sources:
THE SUN
Fish are a great source
Herring
Salmon
Sardines
Tuna
Fortified milk
Fortified cereal
Vitamin D needs:
19-50 year old males and females need 5 µg per day
51-70 year old males and females need more as they age…. 10+ µg per day
71+ year old males and females need 15 µg per day
Upper tolerance:
For all adults, it is 50 µg per day
Interesting fact:
Breastfed babies need to get vitamin D supplements if they do not go outside and get any sun exposure
Breast milk is very low in vitamin D
Website with DRVs:
http://www.fda.gov/FDAC/special/foodlabel/dvs.html