Understanding the Number for Vitamin C Deficiency
                                
                                
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                                    1 min read                                
                            
                                According to the National Health and Nutrition Examination Survey (NHANES), the prevalence of vitamin C deficiency in the US has significantly decreased, yet it's far from eradicated, especially among certain at-risk populations. Understanding what number is vitamin C deficiency requires looking at specific plasma level concentrations, which reveal the severity of the body's ascorbic acid depletion.