Should I eat more when I feel sick? The truth about illness nutrition
                                
                                
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                                    4 min read                                
                            
                                Your immune system requires significant energy and nutrients to fight off illness, which can increase your body's energy needs. When you feel under the weather, the age-old question of 'should I eat more when I feel sick' has a nuanced answer: fueling your body smartly is key to recovery.