expired vitamin b12 injection at a Licensed Pharmacy is it ok to take

Adenosylcobalamin: Like methylcobalamin, adenosylcobalamin is an active form of B12

You can self-administer the injection as well after that

Further, a secondary analysis of a trial in women at high risk for or with existing cardiovascular disease reported that high-dose supplemental B-vitamins (1 mg/day of vitamin B 12 , 50 mg/day of vitamin B6, and 2.5 mg/day of folic acid) for 7.3 years had no effect on risk of non-vertebral fractures (122)

PMID 32956545

Oral GHK-Cu dosing research considers bioavailability differently than injectable research, because oral administration involves gastrointestinal processing before systemic distribution