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Depending on the dosage, some individuals experience immediate and noticeable effects as soon as the B12 starts to infuse, feeling a sense of clarity and energy
Topical bioavailability: Lower but meaningful
Use a slightly larger gauge needle (27G instead of 30G) or inject more slowly to account for the increased viscosity
For a loading protocol of 2.5 mg twice per week, reconstituting with 2 mL gives 2.5 mg/mL, so each 2.5 mg dose is 100 units (the full syringe)
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