These are usually mild and go away over time
Additionally, theres currently no evidence that one form of vitamin B12 supplement, such as capsule or liquid, is better absorbed than another
Hydroxocobalamin | Drugs | BNF NICE
Injection Frequency : For patients requiring frequent B12 injections, using a thinner gauge needle (especially for SC injections) can reduce tissue trauma and discomfort over time
Vegans, vegetarians, and those who eat small amounts of animal-based proteins and meats often see a noticeable difference after vitamin B12 injections
It is essential in the formation of red blood cells, the metabolism of cells, the function of nerves, and DNA production