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Further general information on the clinical pharmacology of cyanocobalamin vitamin B12 for intramuscular injection including contraindications and precautions Quality: B12 Direct works only with country of origin government licensed suppliers and have independently tested our vitamin B12 for quality and safety at Mrieux NutriSciences (Vancouver Canada)

Our registered dietitians considered form, type, dosage, serving size, price, servings per container, ingredients and whether or not you can take the supplement with or without food

It also plays a vital role in the synthesis of collagen, a protein found in connective tissues, skin blood vessels and bones

Additionally, vitamin B12 is necessary for the metabolism of cells throughout the body, including those involved in energy production and DNA synthesis

Serious reactions are extremely rare

The Human Protein Atlas