People with signs and symptoms of B-12 deficiency
Anyone who is displaying any of the signs and symptoms of a B-12 deficiency or pernicious anemia should consult their doctor immediately.
Some common signs and symptoms include:
People who are more a t risk of deficiency
Both diabetes and some medications for type 2 diabetes can increase the risk of vitamin B-12 deficiency.
Also, the following risk factors can increase the chance of developing vitamin B-12 deficiency:
A gastrointestinal tract that does not function normally may inhibit vitamin B-12 release or absorption. For this reason, people with disorders such as celiac disease and Crohn's disease may be at higher risk of vitamin B-12 deficiency.
Individuals who have undergone gastrointestinal surgery, including weight loss surgery, may have less of the cells necessary to secrete stomach acid and intrinsic factor. As a result, they may struggle to absorb B-12.
Vitamin B-12 shots, rather than oral supplements, may be particularly helpful for people who have gastrointestinal issues because injections tend to bypass these areas.
Vegetarians and vegans
As vitamin B-12 is found mainly in fish, meat, eggs, and dairy, people who do not consume these foods are at risk of B-12 deficiency and may benefit from regular B-12 shots or other supplements.
Common side effects of Cyanocobalamin include the following symptoms
injection site reactions (pain, redness, swelling, irritation),
if you suffer from any of those reaction after B12 injection you must see your GP