People who do not eat animal products or older adults who have Vitamin B12 deficiency will likely have to take Vitamin B12-fortified grains or a daily B12 supplement or a multivitamin that contains Vitamin B12
If the issue lies with absorption, B12 shots or IV infusions are an effective alternative to oral supplements because they are administered via injection or intravenously, meaning they do not need to be absorbed through the digestive process
For body-composition and visceral fat goals, 3 to 6 months is often a more realistic evaluation window
The problem is that you cannot verify what you are actually buying, how it was produced, whether it has been stored correctly, or what the long-term effects of using it are
This isolate-and-reintroduce approach is the safest way to troubleshoot
Do not assign both without clear documentation of co-existing distinct conditions