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Because most of what the test measures is inert haptocorrin-bound B12, it is entirely possible to have a normal or even high total B12 while your cells are functionally short
Glucagon receptor activation is minimal at 1-2mg but increases significantly at 4mg and becomes a major driver of the metabolic profile at 8mg and above
If you have symptoms suggestive of deficiency such as persistent fatigue, neurological symptoms, or unexplained anaemia, consult your GP before self-supplementing
Injectable compounded medications require administration from a medication vial using a syringe/needle (instructions on preparing and injecting the medication are provided)
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