Its often mentioned in the same breath as its more famous cousin, GHK-Cu (Glycyl-L-Histidyl-L-Lysine)
Fortunately, vision decline due to a vitamin deficiency is reversible
In a strict "risk-reduction scenario", the switch to tablets made sense at the time, Doctor Sean Ormond of Atlas Pain Specialists tells your correspondent
B12 injections tend to be most useful for: Patients on GLP-1 medications (semaglutide, tirzepatide) who feel fatigue in early weeks Patients with low energy, brain fog, or mood symptoms Vegetarians or vegans (plant foods don't contain B12) Adults over 50 (B12 absorption drops with age) Patients who've had digestive surgeries (bariatric, gallbladder) that affect absorption They're generally safe B12 is water-soluble, so your body excretes what it doesn't use
It remains a research compound that some clinics and individuals have begun using despite the lack of regulatory approval