Both B12 vitamins and injections can help treat a B12 deficiency, although your body will absorb injections much quicker and more easily
[18] FDA identified limitations in characterization data, potential immunogenicity concerns for injectable use, limited information for proposed routes, lack of established effectiveness for obesity, and insufficient long-term safety information
Because injectable B12 is so affordable, it is safer to just obtain a fresh supply
In animal models, it demonstrated efficacy in reducing weight
The angle depends on how much fat there is at the site, which is why technique is judged case by case rather than by a fixed rule
Pregnancy, breastfeeding, kidney disease, severe anemia, and neurologic symptoms may require closer follow-up