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Supplement use, other dietary and demographic variables, and serum vitamin C in NHANES II.

Abstract：

OBJECTIVE:Our objective was to evaluate the effect of regular use of nutritional supplements on serum vitamin C levels in a multivariable regression model, taking into account other dietary and demographic variables which may affect nutritional status. METHODS:We analyzed NHANES II data for subjects age 3 to 74. Analysis was limited to regular supplement users and nonusers, excluding irregular users. Multivariable regression analysis was performed with SUDAAN, incorporating sample weights and accounting for the complex survey design. RESULTS:Regular supplement users had substantially higher serum vitamin C levels than nonusers (p < 0.001). The magnitude of the effect of supplement use on serum vitamin C was 0.23-0.33 mg/dL in children and teens, and 0.36-0.46 mg/dL in adults. In adults who smoked, bottom quartile vitamin C levels were 0.3 mg/dL in men and 0.4 mg/dL in women who did not use supplements, compared to 0.9 and 1.1 mg/dL in regular supplement users. There was a significant interaction of smoking and supplement use in men (p < 0.001). CONCLUSION:Regular supplement use has a strong impact on serum vitamin C levels, independent of other dietary and demographic characteristics of supplement users which may favor improved nutritional status.

journal_name

J Am Coll Nutr

journal_title

Journal of the American College of Nutrition

authors

Dickinson VA,Block G,Russek-Cohen E

doi

10.1080/07315724.1994.10718367

subject

Has Abstract

pub_date

1994-02-01 00:00:00

pages

22-32

issue

1

eissn

0731-5724

issn

1541-1087

journal_volume

13

pub_type

杂志文章

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