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Bread is not inherently bad for weight loss — but bread type matters significantly. White bread has a glycaemic index of approximately 70–75 and provides little fibre; wholegrain bread has a GI of 45–50 and 3–4× more fibre. Karl et al. (2017 RCT) found whole grains increase energy expenditure by 92 kcal/day vs. refined grains. The issue is food quality, not the food category.