Are Donuts Bad for You When Sick? A Nutritional Guide
                                
                                
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                                    4 min read                                
                            
                                Excessive sugar intake has been shown to suppress the immune system's ability to function optimally, which is the exact opposite of what your body needs when fighting an illness. With that in mind, the question of "Are donuts bad for you when sick?" reveals an important truth about nutrient-dense foods versus high-sugar treats during recovery.