injections of b12 are given in the treatment of What is recommended regimen for vitamin deficiency using B12 injections? B12 Injections - Maryland Plastic

Int Immunol (2001) 13:397409

B12 and the Brain A vitamin B12 deficiency is typically one of the first things checked in someone who is experiencing unexplained cognitive impairment, Yourman says, since not getting enough of the essential vitamin can cause memory problems and confusion

The magnitude of benefit is not comparable

PMID: 41993390 bioRxiv GLP-1R Agonism Directly Improves the Pumping Capacity of Murine Collecting Lymphatic Vessels

I cannot emphasize enough the importance of seeing a well-qualified, board-certified physician, or physicians office, who does this procedure frequently, Tracy Evans, MD, board-certified dermatologist, Mohs surgeon, and medical director of Pacific Skin and Cosmetic Dermatology in California, tells Glamour, noting that injecting the undereye area has more risks compared with other areas of the face