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The early 1990s saw the development of SRCP formulations that addressed these issues
[2] Once administered intramuscularly, B12 is gradually released into the bloodstream and transported to the liver, where approximately half of the body's total B12 stores are held
Methylcobalamin is the most expensive form of B12 however is favoured by Dr Knight due to its effectiveness with patients remotely and in clinic
A B12 level above 300 pg/mL is considered normal
Its challenging to identify the exact amount as it differed across various studies
2011, doi: 10.1016/j.cell.2011.02.013
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