What is the 1200 Calorie Mass Gainer and Who Should Use It?
                                
                                
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                                    5 min read                                
                            
                                According to some supplement brands, mass gainers can contain up to 1250 calories per serving. A 1200 calorie mass gainer is a specific, high-potency nutritional supplement designed to help individuals with extremely high caloric needs or very fast metabolisms pack on weight and build muscle mass efficiently.