Q: That's in addition to USRDA levels of other vitamins?
But there's not much evidence that you need more than the USRDA.
Vitamin E might be the exception in that you can see improvements when you give far more than the USRDA.
The USRDA, or Daily Value, for calcium that appears on food and supplement labels is 1,000 mg a day.
But even premenopausal women should know that iron can be constipating, usually only at doses higher than the USRDA.
Basic multivitamins seldom have 100 percent of the 12 vitamins and eight minerals for which there are USRDAs.
Six ounces of Soya Latte, for example, contain just three percent of the USRDA
, while White Wave Dairyless clocks in at four percent.
You'll also get about a quarter of the USRDA
for magnesium and copper, and 15 percent of your daily potassium and copper, and 15 percent of your daily potassium and zinc needs.
When they were give 50 mg a day-way above USRDA
levels but still quite safe-tor replenish all their vitamin B-6 stores, their immune responses were boosted over the levels they had before they entered the study.
There is no USRDA
for fiber, so we used the new Daily Value (DV)-- 25 grams--that will soon appear on food labels.
Most of the other B-vitamins are cheap, which explains why it's not uncommon to see a supplement with 5,000 percent of the USRDA
for B-1 or B-2.
And if your supplement does have any, it shouldn't be more than the USRDA
, which is 5,000 IU.