They are only available for a prescription if the patient has been tested and shows low levels of vitamin B12
It makes B12 a less likely cause and points you toward the next one, often thyroid function, which causes the same kind of washed-out fatigue
"It's important for people who exercise regularly because it helps maintain lean body mass." Endurance360 includes a clinically effective dose of Vitamin B12 alongside Creatine, Beta-Alanine, and Cordyceps to support sustained energy, red blood cell production, and cognitive function
If you experience confusion, fainting, an inability to keep fluids down, a very high body temperature, or changes in mental status, seek emergency medical care immediately
Many people notice an increase in energy and overall well-being shortly after receiving their injection, typically within 24-72 hours