Disponibilidade de polifenóis em frutas e hortaliças consumidas no Brasil

Abstract

OBJECTIVE:To estimate total polyphenol availability in fruits and vegetables commonly consumed in Brazil and its regions, and to identify the main food sources that constitute food habits in this country. METHODS:Total polyphenols were determined by the Folin-Ciocalteu method and the availability estimated according to the Pesquisa de Orçamentos Familiares 2002. Twelve highly consumed food items were chosen, of which six were "tropical fruits" and six were vegetables under the categories of "leafy and fl ower vegetables", "fruit vegetables" and "tuberous vegetables". Polyphenol quantifi cation was performed with three independent experiments, each one in duplicate. The national polyphenol availability was estimated in grams per fresh weight of each analyzed food. Daily per capita availability in Brazil and its regions was calculated using the amount of polyphenol provided by the consumption of the 12 foods analyzed. RESULTS:Polyphenol contents of foods varied from 15.35 to 214.84 mg GAE/ 100 g of fresh weight. Polyphenol availability in Brazil, based on the amount in kilograms that is annually acquired in Brazil, of the 12 selected foods was 48.3 mg/ day, and the Southeast and Central-West regions had the highest and lowest values, respectively. Banana was the main polyphenol source consumed in Brazil, even though this pattern varied among regions. CONCLUSIONS:The estimated daily polyphenol availability in Brazil was similar to other countries. Differences observed among regions could be directly related to distinct cultural habits. Although there is no recommended daily availability of polyphenols, consumption of the recommended daily amount of fruits and vegetables can increase the availability of polyphenols 16 times, showing a clear relationship between the consumption of these food groups and the availability of benefi cial bioactive compounds.

Folhas, talos, cascas e sementes de vegetais: composição nutricional, aproveitamento na alimentação e análise sensorial de preparações

“…A folha de brócolis apresentou teor de polifenóis totais superior ao de seu talo, ao contrário da beterraba, que apresentou teor mais elevado no talo do que na folha. FALLER & FIALHO (2009) RUVIARO et al (2008) testaram a aceitabilidade de duas sobremesas, uma padrão e outra acrescida de 1,5% de farelo de casca e bagaço de laranja entre cinquenta provadores. Os autores perceberam que a sobremesa enriquecida com o farelo obteve índices nutricionais maiores em relação à padrão, principalmente em se tratando da fi bra alimentar e também que ambas as preparações obtiveram média de aceitação acima do conceito ¨gostei regularmente¨, indicando a aceitação do novo produto.…”

Characterization and evaluation of stability of bioactive compounds in fruit smoothies

“…According to data presented by Faller & Fialho (2009), the mean values of polyphenol contents in fruits are 85.1 (mgEAG /100 g) for pineapple, 110.5 (mgEAG /100 g) for mango, 114.6 (mgEAG /100 g) for orange and 15.3 (mgEAG/100 g) for papaya. Considering the smoothies are composed by mixtures of fruits, they have values of polyphenol similar to pineapple (18% lower) when observed at the initial time point (70 mgEAG /100 g).…”

Estimate of consumption of phenolic compounds by Brazilian population

“…In Brazil, studies that have sought to quantify the consumption of these compounds, or identify foods of Brazilian usual diet that are sources of it, are scarce [22][23][24] . Thus, the objective of this study was to estimate the population's intake of total phenolics, considering variables such as gender, household status, the regions of the country, age group, education, nutritional status and income groups and, also, assess what are the food and/or food groups that contribute most to this intake.…”