Is it okay to use expired vitamin C powder? Understanding Safety, Potency, and Storage
                                
                                
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                                    4 min read                                
                            
                                While most vitamins are generally considered safe past their manufacturer's "best by" date, their potency does decrease over time. This is particularly true for water-soluble compounds like vitamin C. So, is it okay to use expired vitamin C powder? The answer is more nuanced than a simple yes or no.