Re: Can anyone tell me amount of Vit.D/Vit.C for prevntion/treatment of swine flu Vitamin D - Wikipedia, the free encyclopedia
Natural sources

Fatty fish, such as salmon, are natural sources of vitamin D.
Natural sources of vitamin D include:
[1]- Fish liver oils, such as cod liver oil, 1 Tbs. (15 mL) provides 1,360 IU (one IU equals 25 ng)
- Fatty fish species, such as:
- Herring, 85 g (3 ounces (oz)) provides 1383 IU
- Catfish, 85 g (3 oz) provides 425 IU
- Salmon, cooked, 100 g (3.5 oz]) provides 360 IU
- Mackerel, cooked, 100 g (3.5 oz]), 345 IU
- Sardines, canned in oil, drained, 50 g (1.75 oz), 250 IU
- Tuna, canned in oil, 85 g (3 oz), 200 IU
- Eel, cooked, 100 g (3.5 oz), 200 IU
- A whole egg, provides 20 IU
- Beef liver, cooked, 100 g (3.5 oz), provides 15 IU
- UV-irradiated mushrooms (Vitamin D2)[27][28]
The practical reality is that on average, the U.S. diet provides 100 IU/day. One problem is that much of the fortified milk is not fortified to the required amount (Vitamin D Dietary Reference Intakes, pp. 256-57).
Adequate Intake has been defined as 200 IU/day for ages infant to 50, 400/day for 51-70, and 600/day over 70. However, the American Academy of Pediatrics argues that these recommendations are insufficient and instead recommends a minimum of 400 IU, even for infants.
[29] The 100% Daily Value used for product labels is 400 IU. The
NIH has set the safe upper limit at 2000 IU, but acknowledges newer data supporting a UL as high as 10,000 IU/day.
[30] The Institute Of Medicine is revisiting vitamin D and calcium recommendations. The report is expected in the northern spring 2010.
Measuring nutritional status
A blood calcidiol (25-hydroxy-vitamin D) level is the accepted way to determine vitamin D nutritional status. The optimal level of serum 25-hydroxyvitamin D is 35–55 ng/mL (or 90-140 nmol/L); with some debate among medical scientists for the slightly higher value.
[26]
For instance, a later classification is:
[31]- 0-14.9 ng/mL = Severely deficient
- 15.0-31.9 ng/mL = Mildly deficient
- 32.0-100.0 ng/mL = Optimal
- >100.0 ng/mL = Toxicity possible
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