where does b12 injection go Shots at Home: How, & How Often to Inject Yourself Best Vitamin B12 Injection Sites
Description
Just half of a cooked salmon fillet (6 ounces) contains more than 200% of the daily value of vitamin B12

When in doubt, storing your B12 in the fridge is the safest option

If you need vitamin B12 injections on a regular basis, you would get cyanocobalamin once a month and hydroxocobalamin every three months

M.et al (2009)

American Pregnancy Association