What are the cons of the glycemic index?
                                
                                
                                •
                                
                                
                        
                                    
                                    4 min read                                
                            
                                According to a 2016 Tufts University study, the glycemic index (GI) value for a single food can vary by as much as 20% in one individual and 25% among different people, highlighting significant variability. This reveals one of many key drawbacks when relying on the glycemic index as a sole dietary tool.