What are the ingredients in Adeno B12 sourced from? Education Team October 04, 2021 19:01 Updated Follow Ingredient Source Vitamin B12 (as adenosylcobalamin) Synthetic Related articles Product Updates How do I use Adeno B12? Does Adeno B12 contain gluten or grains? What is the purpose of each ingredient in Adeno B12? When is the best time of day to take my supplement? Comments 0 comments Article is closed for comments.