Is bread a fast-acting carbohydrate? The surprising nutritional truth
                                
                                
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                                    3 min read                                
                            
                                A single slice of white bread can have a high glycemic index (GI) of 75, causing rapid blood sugar spikes, while a slice of whole-grain rye bread has a much lower GI of 40-50. This reveals that answering whether **is bread a fast-acting carbohydrate?** is far more complex than a simple yes or no, depending largely on its type and preparation.