How Long Does It Take Vitamin C to Work?
                                
                                
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                                    3 min read                                
                            
                                Most people can absorb 70–90% of the vitamin C from their food, but this rate decreases with higher doses from supplements. The time it takes for vitamin C to work varies widely depending on whether it is ingested or applied topically, the specific health goal, and an individual's unique health status.