Dietary supplement use by adolescents

Alves, Crésio; Lima, Renata Villas Boas

doi:10.2223/jped.1907

Cited by 23 publications

(21 citation statements)

References 54 publications

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“…Despite the lack of scientific evidence to support their alleged benefits (1) , worldwide marketing and advertising of several different supplements is intense and far exceeds the data supporting their use.…”

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confidence: 99%

Nutritional supplement use among Slovenian adolescents

Grm

Ars

Besednjak-Kocijančič

et al. 2011

Public Health Nutr.

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AbstractsObjective: Little is known about the prevalence of nutritional supplement use in European adolescents. We conducted the present study to analyse the prevalence of nutritional supplement use and factors associated with this use among Slovenian adolescents. Design: The nutritional supplementation practices of 818 adolescents were studied using an anonymous questionnaire. Information was sought on the type of supplements used, frequency of use and sources of information. Setting: The region of north-west Slovenia. Subjects: Schoolchildren from twenty primary schools and twelve secondary schools. Results: Some 19?3% of all adolescents reported using at least one nutritional supplement and the prevalence of use was significantly higher in adolescents who were members of sports clubs. Multivitamins were the most common nutritional supplement. Older adolescents were significantly more likely to be supplementing with iron, protein and minerals. Less than 16 % of supplement users in our study sought information from health-care professionals. Nearly 62 % obtained information from parents and coaches, and many adolescents appear to decide on nutritional supplementation themselves, without advice. Older adolescents were significantly more likely to combine supplements than younger adolescents. Conclusions: One-fifth of Slovenian adolescents use nutritional supplements. There are clear differences in supplement use between younger (age 12 years) and older (age 17 years) adolescents. Multiple use of supplements, coupled with self-managed supplementation in older adolescents, is concerning. Hence, there is an urgent need to provide accurate information regarding nutritional supplements, which will help adolescents, their parents and coaches to make informed choices about their use.

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mentioning

confidence: 99%

Nutritional supplement use among Slovenian adolescents

Grm

Ars

Besednjak-Kocijančič

et al. 2011

Public Health Nutr.

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“…3 Caffeine is also present in a wide range of nutritional supplements known as "pre-workouts" that are consumed by physically active people who seek to increase their performance. [4][5][6] Unlike in predominantly aerobic exercises in which the effects of caffeine are well-known, the effects of caffeine in strength training and on maximum strength remain controversial. 2 Muscle strength plays an important role in health.…”

Section: Introductionmentioning

confidence: 99%

Muscle Strength and Caffeine Supplementation: Are We Doing More of the Same?

Soares

Garcia

Molina

et al. 2019

Rev Bras Med Esporte

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The purpose of this review was to examine in the current literature the advances made in terms of the effects of caffeine supplementation on maximum strength and its associated mechanisms since the publication of two important papers in 2010. Searches were carried out in the PubMed, Medline, Scielo and Web of Science databases for articles published after 2010. Sixteen studies were included based on inclusion and exclusion criteria. Five studies did not report changes in maximal voluntary strength (31.3%). Four of them used isometric muscle contractions, although this may not be a key factor because five other studies also used isometric contractions and reported ergogenic effects. Furthermore, these four studies evaluated small muscle groups and volunteers were not accustomed to consuming caffeine. Caffeine produced ergogenic effects in eleven of the sixteen studies analyzed (68.8%). None of the doses were clearly related to ergogenic effects; however, a dose of at least 3 mg/kg of caffeine is probably necessary. Caffeine ergogenicity was affected by various factors. There was a lack of standardized protocols and controls for intervening factors (e.g., circadian cycles and nutritional states), which could affect results. An ideal caffeine supplementation protocol that is useful for future research, athletes, and physical activity practitioners, has yet to be defined. A small advance made since 2010 involved a possible lack of gender difference; it would appear that caffeine supplementation affects men and women equally. Level of Evidence I; Systematic Review of Level I Studies.

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“…Atualmente, diversas substâncias com potenciais efeitos ergogênicos são vendidas como suplementos alimentares. Tais suplementos são comercializados prometendo, principalmente, aumento da massa muscular, redução da gordura corporal e melhora no desempenho esportivo 1,2 . Entretanto, estudos relatam que o uso indiscriminado e mal informado dessas substâncias por adultos, adolescentes e até crianças pode gerar mais efeitos deletérios do que os benéficos esperados pelos seus consumidores.…”

Section: Introductionunclassified

“…Entretanto, estudos relatam que o uso indiscriminado e mal informado dessas substâncias por adultos, adolescentes e até crianças pode gerar mais efeitos deletérios do que os benéficos esperados pelos seus consumidores. Assim, há uma emergente necessidade educacional em relação ao uso desses suplementos [1][2][3][4][5][6] .…”

Section: Introductionunclassified

Os efeitos do uso concomitante de cafeína e creatina nos exercícios físicos

Silva¹,

Toigo

2016

Revista Brasileira Ciências Da Saúde - USCS

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Introdução: a creatina e a cafeína encontram-se entre as substâncias mais utilizadas como recursos ergogênicos por aqueles que visam aumento da massa muscular, redução da gordura corporal e melhora no desempenho esportivo. Entretanto, pouco se sabe sobre os possíveis efeitos sinérgicos do consumo concomitante dessas substâncias. Objetivo: buscar evidências na literatura científica sobre os possíveis efeitos da administração dessas substâncias em sujeitos submetidos a exercícios físicos. Método: busca nas bases de dados LILACS, PubMed e SciELO, utilizando-se os termos "creatine", "caffeine", "resistance exercise" e "dietary supplementation". Resultados: onze estudos foram selecionados para análise dos resultados, pois enquadravam-se nos critérios de inclusão. Destes, apenas cinco tratavam do uso exclusivo de creatina associada a cafeína, e o restante, com outras substâncias comercializadas como suplementos alimentares. Os poucos estudos sobre o uso concomitante de creatina com cafeína se diferenciam bastante nos testes e protocolos de suplementação aplicados, tornando difícil evidenciar se o uso de tais substâncias pode realmente proporcionar efeitos benéficos aos seus consumidores. Conclusão: os resultados de três artigos evidenciaram um efeito anulador da cafeína sobre os efeitos ergogênicos da creatina, ao passo que os demais apresentaram evidências contraditórias sobre as variáveis analisadas. Palavras-chave: Cafeína; creatina; exercício. Introduction: creatine and caffeine are among the most widely used substances as ergogenic resources by those looking to increase muscle mass, reduce body fat, and improve athletic performance. However, little is known about the possible synergistic effects of concomitant use of these substances. Objective: to search for evidence in the scientific literature about the possible effects of administration of these substances in subjects undergoing physical exercise. Method: a search in LILACS, SciELO, and PubMed databases, using the terms "creatine", "caffeine", "resistance exercise", and "dietary supplementation". Results: eleven articles were selected for analysis of the results, as they fulfilled the inclusion criteria. Of these, only five dealt with exclusive use of creatine associated with caffeine, and the remaining with other substances marketed as dietary supplements. The few studies on the concomitant use of creatine with caffeine differ greatly in the testing and supplementation protocols applied, making it difficult to conclude if the use of such substances can actually be beneficial to consumers. Conclusion: the results of three articles evidenced an annulment effect of caffeine on the ergogenic effects of creatine, and the others presented conflicting evidence on the variables analyzed.

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Dietary supplement use by adolescents

Cited by 23 publications

References 54 publications

Nutritional supplement use among Slovenian adolescents

Nutritional supplement use among Slovenian adolescents

Muscle Strength and Caffeine Supplementation: Are We Doing More of the Same?

Os efeitos do uso concomitante de cafeína e creatina nos exercícios físicos

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