does b12 injections cause red urine What is Vitamin Deficiency: Signs and Symptoms Seeing Red: Do B12 Injections

It is common for those who follow vegetarian or vegan diets to be vitamin B12 deficient the majority of the population relies on the consumption of meat in order to maintain a healthy level of vitamin B12

The marketing claim that B12 "boosts metabolism" is technically true in the context of correcting a deficiency, since B12 is essential for energy metabolism, but only applies if you are actually deficient

Your body also needs B12 for the development of your central nervous system (your brain and spinal cord)

Stomach cancer can destroy parietal cells that produce intrinsic factor, so B12 wont be absorbed sufficiently