Issues addressed: It is not known whether individuals can accurately estimate the portion size of foods usually consumed relative to standard serving sizes in national food selection guides. The aim of the present cross-sectional pilot study was to quantify what adults and children deem a typical portion for a variety of foods and compare these with the serving sizes specified in the Australian Guide to Healthy Eating (AGHE). Methods: Adults and children were independently asked to serve out their typical portion of 10 common foods (rice, pasta, breakfast cereal, chocolate, confectionary, ice cream, meat, vegetables, soft drink and milk). They were also asked to serve what they perceived a small, medium and large portion of each food to be. Each portion was weighed and recorded by an assessor and compared with the standard AGHE serving sizes. Results: Twenty-one individuals (nine mothers, one father, 11 children) participated in the study. There was a large degree of variability in portion sizes measured out by both parents and children, with means exceeding the standard AGHE serving size for all items, except for soft drink and milk, where mean portion sizes were less than the AGHE serving size. The greatest mean overestimations were for pasta (155%; mean 116 g; range 94-139 g) and chocolate (151%; mean 38 g; range 25-50 g), each of which represented approximately 1.5 standard AGHE servings. Conclusion:The findings of the present study indicate that there is variability between parents' and children's estimation of typical portion sizes compared with national recommendations.So what? Dietary interventions to improve individuals' dietary patterns should target education regarding portion size.
Aim:To report fish and potential mercury intakes in women of child-bearing age and the impact on nutrient intakes. Methods: Women (n = 7486) aged 25-30 years who participated in the Australian Longitudinal Study on Women's Health were categorised according to pregnancy status. Daily fish and nutrient intakes were compared with national recommendations and Nutrient Reference Values. Estimated exposure to fish contaminants was modelled from the National Residue Survey and compared with Provisional Tolerable Weekly Intakes. Results: Mean fish intake for pregnant women was 28.2 g/day, and for women who had given birth within the last 12 months, 27.8 g/day. Both were significantly lower than 'other' women, consuming 33.0 g/day (P = 0.01 and P < 0.001, respectively), and well below the latest suggested intakes by Food Standards Australia and New Zealand. Pregnant women and women who had recently given birth also had significantly lower consumption of long-chain omega-3 fatty acids than 'other' women (P < 0.01 for both) and no groups met suggested dietary targets. Fish can provide up to 915% of a pregnant woman's Adequate Intake for long-chain omega-3s. Contamination of Australian fish is low, with estimated maximum weekly exposure to mercury below the Provisional Tolerable Weekly Intake. Conclusions: Limiting fish intake during pregnancy to minimise exposure to mercury may compromise nutritional adequacy and increase the risk of inadequate intakes of nutrients essential for maternal health and fetal growth and development. Public health recommendations need to balance the risks and benefits of fish consumption within specific countries.
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