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Description
Cobalamin isnt produced by plants or animals but by bacteria

And that's the big challenge
It is currently in Phase 3 clinical trials

and are to be sold at their shop , 1665., 1665

Nature 445 , 661665 (2007)

The clinical trial data is specifically reassuring on this point: across six trials involving approximately 900 participants, glucose levels, insulin levels, and markers of insulin sensitivity remained unchanged from baseline
