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Tear off the paper tab, then push and turn the needle until it is tight
However, its common for blood tests to reveal inaccurate information regarding B12 levels since a high percentage is stored in the liver and not always revealed through testing (for example, taking large amounts of folic acid has been found to mask vitamin B12 deficiency in some patients)
Same compound as our 100mg vial, half the lyophilised powder mass per vial for shorter protocols or pilot studies
Clin Microbiol Rev 17:540552
Conflict of interest The authors declare the following conflicts of interest: MS-R has received honoraria for presentations from HRA Pharma
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