Vitamin B12 (cobalamin) is a vital cofactor for intracellular metabolism. Cats and dogs can't make their own B12 and need to ingest it from dietary sources. Cobalamin needs to bind with intrinsic What Is Vitamin B12 for Dogs? Chewy Neurobion Merck Vitamin B Complex B1,6,12 Nourish Nervous System 50 Tab eBay Vitamin B 12 3000 mcg Injection, 100 mL Petco
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