Is there a vitamin for every letter of the alphabet?
                                
                                
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                                    6 min read                                
                            
                                According to the National Institute on Aging, there are 13 essential vitamins crucial for human health, a number far short of the 26 letters in the alphabet. This fact immediately raises the question: is there a vitamin for every letter of the alphabet, and if not, why not? The answer lies in the history of nutritional science and the reclassification of various compounds once believed to be vitamins.