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can b12 injections cause black stools stool after red stool, is this serious? bruising after b12 injection Type:Vial Vitamin C drip

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The research-grade material supplied by Koi Peptides is synthesized independently for in vitro laboratory research only — not formulated, packaged, or labeled for human use, not equivalent to any approved or investigational drug product, and not authorized for any human or veterinary indication

Vitamin C drip

Type:Vial

Approximately 4 percent of the metformin users were deficient, compared to 2 percent of those on placebo