Anyone experiencing low energy, high stress, poor immune function, or a diet lacking in B vitamins may benefit
Hormone imbalances and thyroid issues can interfere with metabolism, meaning shots alone wont address the root cause
Your other B vitamins are all consumed and it takes 2 to 3 times longer to recover from the hangover
However, the primary use of B12 injections around the world, and the main reason people need it so badly, is because of a disorder called pernicious anemia
The honest caveat: most of this evidence is from cell and animal studies
Due to how it helps convert and synthesize many other compounds within the body, its needed for well over 100 daily functions