Are There Different Grades of Vitamins? Understanding Supplement Quality
                                
                                
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                                    3 min read                                
                            
                                According to the Centers for Disease Control and Prevention (CDC), nearly half of all U.S. adults take one or more dietary supplements, including vitamins. But with so many options available, consumers often wonder, 'are there different grades of vitamins?' The truth is, significant quality variations exist among vitamin supplements, ranging from pharmaceutical-grade to feed-grade.