do avocados have glutathione 10 Foods That Contain – Core Med Science Glutathione: Benefits and Supplements
Description
[1] [3] These injections are prescription-only medicines (POMs) typically prescribed by GPs for patients with confirmed B12 deficiency
PMID 15476449

Methylcobalamin: the form in which B12 is found in plasma
doi: 10.1155/2022/7113958

The chances of injecting the medication into a blood vessel in subcutaneous fat are low but possible (Sepah, 2017)