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It is found in human blood, saliva, and urine, with plasma levels declining from approximately 200 ng/mL at age 20 to 80 ng/mL by age 60
This provides approximately 4mcg/kg for a 160lb individual, falling within the effective clinical range
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It is important to note that these dosage suggestions are not based on scientifically validated evidence and should be considered speculative
The dosage and frequency of B12 injections should be tailored to the individual patients needs, taking into account factors such as the severity of deficiency and ongoing absorption issues. Other things like age, health problems, and symptoms can also play a part
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