Animal-based foods contain the highest amount of vitamin B12, this is why vegans and vegetarians are often at risk of developing a deficiency
This compound is not approved as a drug, diagnostic, or dietary ingredient, and is not manufactured, packaged, or marketed for consumption, self experimentation, clinical application, or any use outside properly designed and ethically approved research protocols.
Some feel a boost in energy within 24 hours, while others notice gradual changes over the week
[3] Sublingual and nasal preparations are available but are not routinely recommended within UK clinical guidance and may not be licensed as medicines
Sometimes I'll go an extra day or two between injections but so far my limit is 48 hours and at that I feel my best