Is 5mg Equal to 400 mcg? A Crucial Conversion Explained for Medication and Supplements
                                
                                
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                                    3 min read                                
                            
                                According to the National Health Service (NHS), one milligram (mg) contains 1,000 micrograms (mcg), making the answer to 'Is 5mg equal to 400 mcg?' a definitive and medically significant 'no'. This is a critical point of distinction when managing medication and nutritional supplements, where accuracy is paramount to health and safety.