Является, в этом хлебе нет клетчатки, которая как раз и есть медленный углевод.3. Your carbs are white Boost your fiber intake by switching to whole wheat bread, pasta, and eating more fruits and vegetables. Research shows that some fiber can rev your fat burn by as much as 30%. Studies find that women who eat the most fiber gain the least weight over time. Aim for about 25 g a day--the amount in about three servings each of fruits and vegetables.https://shine.yahoo.com/healthy-living/10-diet-mistakes-slow-metabolism-131600471.html