Dietary Supplements in a National Survey: Prevalence of Use and Reports of Adverse Events

Epidemiology Team, Office of Scientific Analysis and Support, College Park, MD 20740, USA.
Journal of the American Dietetic Association (Impact Factor: 3.92). 01/2007; 106(12):1966-74. DOI: 10.1016/j.jada.2006.09.002
Source: PubMed

ABSTRACT To examine information collected from the 2002 Health and Diet Survey regarding the use dietary supplements and self-reported health problems that the survey participants believed were related to dietary supplements.
The US Food and Drug Administration sponsors a Health and Diet Survey to track trends of consumer awareness, attitudes, and practices related to health and diet issues. By telephone, the 2002 Health and Diet Survey staff interviewed English-speaking noninstitutionalized adults aged 18 years or older in households in the 50 states and District of Columbia. Survey respondents were queried as to whether or not they had taken a dietary supplement during the past year and if they had experienced any health problem that they attributed to supplement use.
Seventy-three percent of US noninstitutionalized adults aged 18 years or older who spoke English and resided in households with telephones used a dietary supplement in the previous 12 months and 4% of them had experienced an adverse event that they believed might be related to dietary supplement use. Eighty-five percent of supplement users reported taking multivitamins/multiminerals and 13.3% of adverse events reported were attributed to multivitamins/multiminerals. A higher proportion of supplement users with adverse events than users without adverse events were concurrently taking supplements and prescription drugs or were taking supplements instead of prescription drug to treat or prevent a health condition.
This self-reported data describes the prevalence of supplement use and related adverse events. Multivitamins/multiminerals accounted for much of the supplements use and was attributed to a little more than 10% of the adverse events reported. Food and nutrition-professionals and other health care professionals should take special care to learn about their patients' use of these products.

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Available from: Chung-Tung J. Lin, Aug 05, 2014
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    • "In addition, parents of allergic children were thought to be more fearful regarding the adverse effects of supplements. Timbo et al [19] reported that 4% of the supplement users in their study experienced adverse effects, but only 1 patient had a rash after taking probiotics. In our present study, univariate analysis indicated that older age and a positive family history were associated with higher supplement use. "
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    ABSTRACT: This study was conducted to determine the frequency and characteristics of supplement use in pediatric patients with allergic disorders in Japan. A total of 229 patients with various allergic disorders aged between 0 and 15 years were enrolled. Supplements were defined as preparations that provided nutritional content in the form of a tablet, capsule, powder, liquid, or jelly. The parents of each subject were asked to complete a questionnaire on their child's use of supplements over the previous year. Demographic information, parents' perceived view of the child's health status over the previous month, and family history of both allergic disorders, and supplement use were collected. Four hundred eight age- and sex-matched healthy children served as the controls. Twenty-nine (12.7%) patients had used supplements. This frequency was not significantly different from that in the control group (15.0%). The types of supplements most commonly used were vitamins, followed by minerals, probiotics, and chlorella. Univariate analysis revealed that older age and a positive family history of supplement use were associated with patients' supplement use. The types of allergic disorders, health status from the point of view of the parents, and a family history of allergic disorders did not show any significant association. To our knowledge, this is the first cross-sectional study to demonstrate the frequency and the factors affecting supplement use in pediatric patients with allergic disorders.
    Nutrition research 11/2012; 32(11):893-6. DOI:10.1016/j.nutres.2012.09.017 · 2.59 Impact Factor
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    • "Van Thuyne, Van Eenoo, and Delbeke (2006) reported that dietary supplements (minerals, vitamins, trace elements & other components) could be one or more nutrients in a concentrated form, which are available in a normal and balanced diet. The global market for supplements has increased during the recent years (Crowley & FitzGerald, 2006; Maughan, King, & Lea, 2004) and a high prevalence of supplement use was seen not only in the United States and Europe (Skeie et al., 2009; Timbo, Ross, McCarthy, & Lin, 2006), but also in Asian countries (Kim et al., 2010; Tee, 2002; Tian, Ong, & Tan, 2009). It has been reported that the highest rate of nutritional supplement (NS) use is among athletes (Braun et al., 2009; Dascombe, Karunaratna, Cartoon, Fergie, & Goodman, 2010; Erdman, Fung, & Reimer, 2006; Huang, Johnson, & Pipe, 2006; Maughan et al., 2004). "
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    ABSTRACT: The aim of this study was to assess nutritional supplement use among fitness club participants in Tehran, Iran. A cross sectional study was conducted in 24 fitness clubs throughout the city of Tehran, Iran. A total of 1625 fitness club participants were recruited to participate in this study. They were asked to complete a self-administered pre-tested questionnaire. Descriptive statistics and chi-square test were performed to determine the characteristics of participants, reasons for supplement use, sources of information and also the influential advisors regarding nutritional supplement use. A high prevalence rate of nutritional supplement use (66.7%) was reported. Overall, multivitamin-mineral (43.8%) and iron tablets (30.5%) were the common nutritional supplements used and only a small number of participants used illegal substances (0.5%). Younger participants were more likely to use ergogenic aids, whereas, older participants were more likely to use vitamin D. Males were more likely than females to use creatine and amino acids, whereas, iron tablets and mint water were more common among females. Also, males were more likely to use nutritional supplements for increasing energy, whereas, females were more likely to use nutritional supplements for nutritional deficiencies. In conclusion, a high prevalence rate of nutritional supplement use was seen among participants.
    Appetite 09/2012; 60(1). DOI:10.1016/j.appet.2012.09.011 · 2.69 Impact Factor
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    • "A number of participants consumed the same ingredient from two or more supplements. Particularly for fat-soluble vitamins, which accumulate in the body, this raises questions regarding the risks of overdosing and potential negative effects of supplements (Palmer et al., 2003; Timbo et al., 2006; Mulholland and Benford, 2007). "
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    ABSTRACT: Dietary supplement use is increasing, but there are few comparable data on supplement intakes and how they affect the nutrition and health of European consumers. The aim of this study was to describe the use of dietary supplements in subsamples of the 10 countries participating in the European Prospective Investigation into Cancer and Nutrition (EPIC). Specific questions on dietary supplement use were asked as a part of single 24-h recalls performed on 36,034 men and women aged 35-74 years from 1995 to 2000. Between countries, the mean percentage of dietary supplement use varied almost 10-fold among women and even more among men. There was a clear north-south gradient in use, with a higher consumption in northern countries. The lowest crude mean percentage of use was found in Greece (2.0% among men, 6.7% among women), and the highest was in Denmark (51.0% among men, 65.8% among women). Use was higher in women than in men. Vitamins, minerals or combinations of them were the predominant types of supplements reported, but there were striking differences between countries. This study indicates that there are wide variations in supplement use in Europe, which may affect individual and population nutrient intakes. The results underline the need to monitor consumption of dietary supplements in Europe, as well as to evaluate the risks and benefits.
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