There are varying forms of oral B12 supplementation. The sublingual kind does not involve the digestive system, it's absorbed diffusely at the mouth/throat. J

There are varying forms of oral B12 supplementation. The sublingual kind does not involve the digestive system, it's absorbed diffusely at the mouth/throat. Jarrows makes them in methylcobalamin form. Note however in my experience it caused painful neck stiffness after a week of use. But there were other positive effects observed, so it was definitely doing something. The lucid dreaming on the first couple days was quite interesting.