Typically, a healthcare professional will inject them for you, but you can also sometimes do them at home
According to Consumer Lab, Although no Upper Tolerable Intake Level has been established, there are risks associated with getting too much B-12 from supplements. What are the side effects of B12
Patients should avoid ingesting large amounts of vitamin C within 1 hour of oral vitamin B12 administration Extended release potassium products Antibiotics such as gentamicin, neomycin, tobramycin Anti-seizure medications such as phenobarbital, phenytoin, primidone Medicines used to treat heartburn like H2 blockers such as cimetidine and proton pump inhibitors such as omeprazole Antacids such as ranitidine, cimetidine Vitamin B12 Injection Storage and Safety Information Vitamin B12 tablets should be in a cool and dry place
SQ delivery may help, because fat tissue has fewer blood vessels than muscle, leading to slower dispersion of B12
If you are on a vegan diet, you should change your diet to include B12 fortified cereals and grains
