b12
The ASMBS recommends 350 to 500 mcg daily sublingual or 1000 mcg by injection once a month, unless your labs show you need more. Many people do need more, though.
Please note: I AM NOT A DOCTOR. If you want medical advice, talk to your doctor. Whatever I post, there is probably some surgeon or other health care provider somewhere that disagrees with me. If you want to know what your surgeon thinks, then ask him or her. Check out my blog.