What is 1000 IU in mg? A Guide to Vitamin Conversion
                                
                                
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                                    4 min read                                
                            
                                Over 77% of U.S. adults take dietary supplements, with many products displaying dosages in International Units (IU) instead of milligrams (mg). The key takeaway is that the mass of 1000 IU varies significantly depending on the specific vitamin, making it crucial to understand the conversion factors for an accurate dose.