there is no large human RCT for either
Cyanocobalamin injections are rarely used in UK clinical practice, while methylcobalamin injections are generally unlicensed in the UK
NICE recommends lifelong intramuscular replacement for vitamin B12 deficiency caused by autoimmune gastritis, or after total gastrectomy or complete terminal ileal resection
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Metabolism & Well-Being Supports energy production by converting carbohydrates, proteins, and fats into cellular fuel, with B6, Niacin, and Pantothenic Acid for nervous system health
Its vital for energy production, red blood cell formation, brain function, and nerve health