Dietary Reference Intakes The Essential Guide to Nutrient Requirements (2006) / Chapter Skim
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Pages 414-422
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From page 414... ...
TABLE 1 Dietary Reference Intakes for Boron, Nickel, and Vanadium by Life Stage Groupa DRI values (mg/day) Vanadiumc Boron Nickel ULb UL UL Life stage groupd NDe 0 through 6 mo ND ND 7 through 12 mo ND ND ND 1 through 3 y 3 0.2 ND 4 through 8 y 6 0.3 ND 9 through 13 y 11 0.6 ND 14 through 18 y 17 1.0 ND 19 through 30 y 20 1.0 1.8 31 through 50 y 20 1.0 1.8 51 through 70 y 20 1.0 1.8 > 70 y 20 1.0 1.8 Pregnancy £ 18 y 17 1.0 ND 19 through 50 y 20 1.0 ND Lactation £ 18 y 17 1.0 ND 19 through 50 y 20 1.0 ND a Data were insufficient to set a UL for arsenic and for silicon.
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From page 415... ...
PART III: ARSENIC, BORON, NICKEL, SILICON, AND VANADIUM 415 ARSENIC, BORON, NICKEL, SILICON, AND VANADIUM T here is evidence that the minerals arsenic, boron, nickel, silicon, and vanadium play a beneficial role in some physiological processes of cer tain animal species. For boron, silicon, and vanadium, measurable responses by human subjects to dietary intake variations have also been demonstrated.
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From page 416... ...
DRIs: THE ESSENTIAL GUIDE TO NUTRIENT REQUIREMENTS 416 Boron: A collective body of evidence has yet to establish a clear biological func tion for boron in humans. Although some evidence does suggest a role in the metabolism of vitamin D and estrogen, further research is necessary.
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From page 417... ...
PART III: ARSENIC, BORON, NICKEL, SILICON, AND VANADIUM 417 Silicon: Findings indicating that as much as 50 percent of ingested silicon is excreted in the urine suggest that some dietary forms of silicon are well absorbed. Silicon in the blood exists almost entirely as silicic acid and is not bound to proteins.
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From page 418... ...
DRIs: THE ESSENTIAL GUIDE TO NUTRIENT REQUIREMENTS 418 According to data from the Third National Health and Nutrition Examina tion Survey (NHANES III, 1988–1994) at the 95th percentile, intake of boron from the diet and supplements was approximately 2.8 mg/day.
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From page 419... ...
PART III: ARSENIC, BORON, NICKEL, SILICON, AND VANADIUM 419 considered part of the apparently healthy general population, further research on vanadium toxicity is needed. Vanadium in the forms of vanadyl sulfate (100 mg/day)
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From page 420... ...
DRIs: THE ESSENTIAL GUIDE TO NUTRIENT REQUIREMENTS 420 16 percent) , and desserts (4–18 percent)
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From page 421... ...
PART III: ARSENIC, BORON, NICKEL, SILICON, AND VANADIUM 421 INADEQUATE INTAKE AND DEFICIENCY This information was not provided at the time the DRI values for these nutrients were set. EXCESS INTAKE Arsenic: Arsenic occurs in both inorganic and organic forms, with the inorganic forms that contain trivalent arsenite (III)
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From page 422... ...
DRIs: THE ESSENTIAL GUIDE TO NUTRIENT REQUIREMENTS 422 Silicon: There is no evidence that naturally occurring silicon in food and water produces adverse health effects. Limited reports indicate that magnesium trisilicate (6.5 mg of elemental silicon per tablet)
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