What is Adeno B12 derived from? Emily November 03, 2018 17:12 Updated Follow Adenosylcobalamin is derived via microbial fermentation. Related articles Does Adeno B12 contain corn or grain-derived ingredients? Are there any side-effects or precautions when using Adeno B12? Why does the B Minus contain 150 mg of Vitamin B-5, when the B Complex Plus has only 125 mg? Does Optimal Adrenal contain corn or grain-derived ingredients? What is Hydrox-Adeno B12 derived from? Comments 0 comments Article is closed for comments.