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Dietary Intake and supplement use of vitamin C and E and upper respiratory tract infection
KTH, School of Computer Science and Communication (CSC), Human - Computer Interaction, MDI (closed 20111231).ORCID iD: 0000-0001-5626-1187
2011 (English)In: Journal of the American College of Nutrition (Print), ISSN 0731-5724, E-ISSN 1541-1087, Vol. 30, no 4, 248-258 p.Article in journal (Refereed) Published
Abstract [en]

OBJECTIVE:

Antioxidants are regulators of immune function and may play a role in upper respiratory tract infections (URTI). We investigated the potential effects of dietary intake from food and supplement use of vitamins C and E on the risk of self-reported URTI.

METHODS:

We conducted a population-based cohort study of 1509 Swedish men and women ages 20 to 60 with a follow-up period of 4 months. Participants reported a total of 1181 occurrences of URTI. Poisson regression model was used to control for age, sex, and other confounding factors.

RESULTS:

Among women, we found that the incidence rate ratio (IRR) for high intake of vitamin C (>200 mg/d) from food was 0.69 (95% CI 0.49-0.98) compared with low intake (<100 mg/d). This association was not seen among men, for whom the IRR was 1.16 (95% CI 0.79-1.70) for high intake of vitamin C (>150 mg/d) compared with low intake (<50 mg/d). We saw no protective effect of vitamin E from food among either men or women, but a possible protective effect of vitamin C and E supplement use among men (vitamin C, 0.69 [95% CI 0.47-1.02]; vitamin E, 0.56 [95% CI 0.33-0.95]), although not among women.

CONCLUSION:

The present study is the first observational study to suggest that intake of vitamin C from food is sufficient to lower the risk of URTI among women. In addition, it appears that supplement use of vitamin E and vitamin C may reduce the risk of URTI among men, who overall had a lower intake of vitamin C from food than women.

Place, publisher, year, edition, pages
2011. Vol. 30, no 4, 248-258 p.
Keyword [en]
Antioxidants, Epidemiology, URI, URTI, Web questionnaires
National Category
Computer and Information Sciences
Identifiers
URN: urn:nbn:se:kth:diva-59502ISI: 000208685400004PubMedID: 21917705Scopus ID: 2-s2.0-83455221001OAI: oai:DiVA.org:kth-59502DiVA: diva2:475610
Funder
Swedish Research Council, 2005-7102
Note

QC 20120112

Available from: 2012-01-11 Created: 2012-01-11 Last updated: 2018-01-12Bibliographically approved

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Bälter, Olle

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