Which B Vitamin Is Folinic Acid? All About Vitamin B9
                                
                                
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                                    4 min read                                
                            
                                According to the National Institutes of Health, folate intake can be a complex topic, especially distinguishing between its various forms like folinic acid. For those wondering, which B vitamin is folinic acid, the answer is that it is a biologically active form of vitamin B9, but distinct from the more common synthetic folic acid.