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This vitamin also plays a significant role in the functioning of the nervous system and supports the synthesis of DNA

It can mean more binding protein in circulation, vitamin released from injured cells, reduced clearance by the liver or kidneys, recent intake, or analytical interference, where the measured value does not accurately reflect the true B12 status

The FDA does not approve compounded medications for safety, quality, or manufacturing

Coverage depends on the specific scenarios each MACs SAD article recognizes as not self-administered, such as documented incident-to administration under direct physician supervision or certain acute and emergency-department circumstances

Weight loss is consistent and significant

Blood tests can determine B12 status, and if deficiency is confirmed, appropriate supplementation or treatment (such as intramuscular injections for pernicious anaemia) can be initiated according to NHS protocols