Below is a general timeline based on common clinical experience and published research, with the reminder that individual responses vary
If you are taking medications such as metformin, proton pump inhibitors, or H2 receptor antagonists, speak to your GP or pharmacist, as these can affect B12 absorption
The appropriate option depends on the patients goals, health history, safety needs, and provider recommendation
References Stier H
This represents a fundamental safety distinction from full-length human growth hormone, which consistently elevates IGF-1 through traditional growth hormone receptor activation
I don't doubt in the least that juanpablo is suffering from something, but I'd be surprised if B12 had anything to do with it