How Long Does It Take to Reverse B12 Deficiency?
                                
                                
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                                    4 min read                                
                            
                                According to the National Institutes of Health, a vitamin B12 deficiency can go unnoticed for years because the body stores several years' worth of the vitamin in the liver. The time it takes to reverse B12 deficiency varies significantly based on factors like severity, treatment method, and the underlying cause.