What is the unhealthiest drink at McDonald's? A Definitive Guide
                                
                                
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                                    2 min read                                
                            
                                According to Center for Science in the Public Interest, a large McDonald's Strawberry Shake can contain up to 850 calories and 106 grams of sugar. This surprising fact reveals the extreme calorie density of some menu items, raising the question: what is the unhealthiest drink at McDonald's?