What is the optimal amount of vitamin C per day?
                                
                                
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                                    4 min read                                
                            
                                According to the National Institutes of Health, the Recommended Dietary Allowance (RDA) for adult men is 90 mg of vitamin C per day, while for adult women it is 75 mg. This standard, however, doesn't always reflect the 'optimal' amount for robust health, which many factors can influence.