https://vc-food-drug.kums.ac.ir/fa/news/33179/%d8%b1%db%8c%da%a9%d8%a7%d9%84-%d8%a2%d9%85%d9%be%d9%88%d9%84-%d9%88%db%8c%d8%aa%d8%a7%d9%85%db%8c%d9%86-B12