Plea for New RDA for Vitamin C: Experts Call for Review of Recommended Dietary Allowance for Vitamin C
Provided by PR Newswire on 8/24/2004
Source: Health World Online
SAN DIMAS, Calif., Aug 24, 2004 /PRNewswire via COMTEX/ -- With newly published research reports showing that higher concentrations of vitamin C can be achieved in the blood plasma than previously thought possible, antioxidant researchers have penned their names to a plea for a scientific re-evaluation of the Recommended Dietary Allowance (RDA) for vitamin C.
A dozen prominent antioxidant researchers, authors, and clinicians say the prevalent belief that 200 milligrams of oral vitamin C, an amount that can be obtained by eating five servings of selected fresh fruits and vegetables, can saturate the blood plasma and additional amounts are excreted in the urine, has now been disproved. Two recently published papers indicate that blood plasma levels of ascorbic acid can be raised three times greater than a flawed 1996 study indicates. One of the published studies shows that blood plasma concentrations of vitamin C continue to rise with a single 1000 milligrams dose of supplemental vitamin C.