What is Adeno B12 derived from? Emily April 01, 2019 17:17 Updated Follow The adenosylcobalamin is synthetic. Related articles Are there any side-effects or precautions when using Adeno B12? What is the expiration date on Adeno B12? Does Adeno B12 contain corn or grain-derived ingredients? Why does the B Minus contain 150 mg of Vitamin B-5, when the B Complex Plus has only 125 mg? What is Hydrox-Adeno B12 derived from? Comments 0 comments Article is closed for comments.