How many units is cholecalciferol 125 mcg? Understanding Vitamin D Conversion
                                
                                
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                                    3 min read                                
                            
                                According to the National Institutes of Health, 1 microgram (mcg) of vitamin D is equivalent to 40 International Units (IU). Therefore, if you're wondering how many units is cholecalciferol 125 mcg, the calculation is straightforward: it is 5,000 IU. This conversion is critical for understanding supplement labels and ensuring proper vitamin D intake.