Why Can't You Eat a Lot of Walnuts? The Hidden Dangers of Excess
                                
                                
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                                    3 min read                                
                            
                                An ounce of walnuts provides about 185 calories, making them a highly calorie-dense food. While celebrated for their health benefits, the high calorie count is one of several reasons why you can't eat a lot of walnuts without risking adverse effects.