Can too much B12 affect your liver? A comprehensive guide
                                
                                
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                                    3 min read                                
                            
                                The human liver acts as the body's primary storage site for Vitamin B12, capable of holding several years' worth of reserves. It's this storage function that provides a critical clue to the question: can too much B12 affect your liver? Often, a surplus of B12 in the bloodstream is a sign of an existing health issue, not a cause.