Consumption of nuts and similar dried foods in Portugal and level of knowledge about their chemical composition and health effects
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Nuts are consumed worldwide and have valuable nutritional compositions. However, few studies
exist about the consumers‘ knowledge regarding nuts and similar dried fruits. This study aimed to
investigate the knowledge on nuts composition (KNC) and health effects (KNHE) associated with
nuts consumption and evaluate eating habits and preferences. A questionnaire survey was applied
by direct interview to 300 Portuguese citizens, recruited by convenience. Anthropometric
properties, behavioural and health aspects, knowledge about nuts composition and health effects,
and consumption habits and preferences were evaluated and statistically analysed. Globally, the
participants were not well informed on the chemical composition of nuts and about their effects on
human health. Regarding age, the middle-aged adults showed a little higher level of KNC.
However, no statistical differences were observed for KNC and KNHE across groups of Body
Mass Index, physical exercise practice or balanced diet. Concerning eating habits and preferences,
most participants (84%) like nuts, and usually consume them (58%). Among different nuts, the
most consumed ones were peanuts and walnuts, followed by almonds and hazelnuts. A vast
majority of participants (86%) preferred to eat the nuts in their simple form and consume them
between meals. In conclusion, improvement of communication on nuts benefits to human health
might be a way to increase their consumption. Our data can also help the nut industries to
formulate a better strategy.