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HY-B12 Vitamin B12 Injection is formulated for the treatment and prevention of vitamin B12 deficiency in lambs, calves, sheep, and cattle

& Krebs, J

it is naturally occurring, nontoxic, and is active at a very low nanomolar concentration.11 Another piece of research described GHK-Cu as a safe, inexpensive, extensively studied compound.3 These conclusions primarily apply to topical GHK-Cu, but even with injectables, the lack of serious adverse events in animal subjects points to a general tolerability regardless of the route of administration

By comparison, cyanocobalamin, a form of B12 commonly found in many supplements, has a cyanide group on the cobalamin instead of a methyl group

People who have had gastrointestinal surgery, such as having part or all of their stomach removed for weight loss