Nutrition
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In the public health arena, a single component of total dietary intake, such as sugar intake, has been questioned as the health risk of obesity. This study aimed to investigate if the uptrend of obesity prevalence in the USA is associated with dietary sugar intake when other dietary intakes are controlled. ⋯ Energy intake was the primary contributor to body mass index in all age groups in this study. The major energy sources of children and adolescents differed from those of adults. The implicated associations between energy and macronutrient intakes indicate that keeping energy balance is the primary strategy to avoid obesity.
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The present study identified the effects of heat oxidation on protein carbonyl content and α,α-diphenyl-β-picrylhydrazyl (DPPH) free radical-scavenging activity in soy protein. The changes on antioxidant status in male mice fed a heat-oxidized diet were also investigated. ⋯ Heat-oxidized soy protein showed a relatively higher protein carbonyl content and a loss of its free radical-scavenging activity in vitro. The heat oxidation also led the soy protein to generate reactive oxygen species, decrease the antioxidant status, and induce redox imbalance in vivo. The heat oxidation of food protein could be a potential health risk in humans.
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Editorial Comment
Beneficial effects of coffee consumption go beyond antioxidation.