bpc 157 for hypermobility BPC-157: What It Is, What We Know, and Why Its Use Arthritis Remains Unproven BPC-157 Benefits, Dosage & Before/After
Description
Pain 14 , 941947 (2013)

So injecting beyond a certain point may cause your cells to fight off the excess B12 so hard that it might reduce the amount of active cellular B12 - probably not to dangerous levels, but possibly sufficient to trigger some symptoms

Testing has found 12-58% of ergogenic nutritional supplements contaminated with undeclared substances

Food and Drug Administration (FDA)
