What is the best source of vitamin B7?
                                
                                
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                                    4 min read                                
                            
                                According to the National Institutes of Health, biotin deficiency is extremely rare in healthy individuals who eat a balanced diet. The best source of vitamin B7 is a varied and balanced diet that includes certain nutrient-dense foods, with cooked liver and egg yolks topping the list for their high biotin concentration.