Journal
NUTRIENTS
Volume 15, Issue 5, Pages -Publisher
MDPI
DOI: 10.3390/nu15051301
Keywords
bread; carbohydrate; glucose; insulin; overweight; weight reduction
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The study analyzed the effects of two different breads on body weight without further lifestyle modification. It found that replacing a common insulinogenic bread with a low-insulin-stimulating bread can lead to significant weight loss, especially for overweight individuals, particularly those at older age.
The impact on body weight development is usually analysed by comparing different diet types. Our approach was to change only one component, namely bread, common to most diets. In a single-centre triple-blind randomised controlled trial the effects of two different breads on body weight were analyzed without further lifestyle modification. Overweight adult volunteers (n = 80) were randomised 1:1 to exchange previously consumed breads for either a rye bread from milled whole grain (control) or a medium-carbohydrate, low-insulin-stimulating bread (intervention). Pre-tests demonstrated that the two bread types strongly differed in the glucose and insulin response elicited, but had similar energy content, texture and taste. The primary endpoint was the estimated treatment difference (ETD) in change of body weight after 3 months of treatment. Whereas body weight remained unchanged in the control group (-0.1 +/- 2.0 kg), significant weight reduction was observed in the intervention group (-1.8 +/- 2.9 kg), with an ETD of -1.7 +/- 0.2 kg (p = 0.007), that was more pronounced in participants >= 55 years (-2.6 +/- 3.3 kg), paralleled by significant reductions in body mass index and hip circumference. Moreover, in the intervention group, the percentage of participants with significant weight loss (>= 1 kg) was twice as high as in the control group (p < 0.001). No other statistically significant changes in clinical or lifestyle parameters were noted. Simply exchanging a common insulinogenic bread for a low-insulin-stimulating bread demonstrates potential to induce weight loss in overweight persons, especially those at older age.
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