It is derived from animal products such as red meat, dairy, and egg
Reference: Dimet-Wiley AL, Latham CM, Brightwell CR, Neelakantan H, Keeble AR, Thomas NT, Noehren H, Fry CS, Watowich SJ (2024)
Also, injections are not typically recommended for people without a vitamin B12 deficiency
One hundred type 2 diabetes mellitus patients on metformin 4 months with vitamin B12 deficiency were enrolled in this study and randomized equally into two groups
Preliminary research also shows that pairing vitamin B12 supplementation with antidepressants could help significantly reduce symptoms of major depressive disorder to a greater extent than treatment with an antidepressant alone
B12 shots are not given to help with weight loss, and they are unlikely to cause you to lose weight