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A: Key biomarkers include body weight, fat mass, glucose and insulin levels, and markers related to NAD+ metabolism

Vitamin B12 is a water-soluble vitamin essential for energy metabolism, red blood cell formation, and neurological function, but has no licensed indication for weight loss in the UK

These vitamins have other biological functions

[6] [65] [83] In modern industrial agriculture, livestock diets are frequently supplemented with vitamin B 12 or its precursor, cobalt

This was because hydroxocobalamin produced by bacteria was changed to cyanocobalamin during purification in activated charcoal columns after separation from the bacterial cultures (because cyanide is naturally present in activated charcoal)