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PMC 8812048
This timeline matches B12 pharmacokinetics: intramuscular methylcobalamin reaches peak serum concentration at 8-12 hours, but tissue saturation (particularly in the liver and nervous system) occurs over 48-72 hours as the vitamin is transported into cells and converted to active coenzyme forms (Andrs et al., 2018)
For many, fat loss goes beyond sheer willpowerits a complex biological puzzle
Prevents the patient from travelling when feeling weak or disoriented
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