Is there a difference between cheap and expensive vitamin D?
                                
                                
                                •
                                
                                
                        
                                    
                                    4 min read                                
                            
                                According to a 2013 study published by Kaiser Permanente, the actual amount of vitamin D in over-the-counter supplements can range from 9% to 146% of the dose listed on the label. This startling variability is a key indicator that there is indeed a difference between cheap and expensive vitamin D, extending far beyond the price tag.