B12 plays a key role in the normal functioning of the nervous system, the brain and in the formation of the building blocks of every cell in the body
This is why it's particularly important during periods of rapid growth, such as pregnancy and childhood
Additionally, chronic conditions such as HIV and tuberculosis have been implicated in B12 deficiency due to increased metabolic demand and altered absorption mechanisms ( The diagnosis of vitamin B12 deficiency typically relies on low total B12 levels and elevated concentrations of homocysteine (Hcy), as well as levels of transcobalamin-bound B12 (holoTC) and methylmalonic acid (MMA), which serve as functional indicators of cobalamin insufficiency ( Vitamin B12 requirements fluctuate throughout the life course, influenced by metabolic demand and physiological changes
They may be a good option if you want a quick visit without a full IV drip
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Elevated B12 levels often indicate underlying health conditions such as liver disease, kidney dysfunction, or haematological disorders rather than simple overconsumption
