Does BCO Cause Weight Gain? Separating Fact from Fiction
                                
                                
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                                    3 min read                                
                            
                                Despite popular myths, the connection between BCO—most often referencing B-complex vitamins in a health context—and weight gain is not direct and lacks robust scientific evidence. The primary role of these vitamins is to support metabolic function and convert food into energy, not to add calories or fat.