Vitamin B-12 is critical for the proper functioning of your body, and a deficiency could lead to severe health problems, including fatigue, depression, memory loss, and joint pain. This vitamin actually creates red blood cells in the body, which, if you remember anything from your high school science class, are critical for bodily function. Plus, it helps generate DNA and even maintains a healthy nervous system. Sound pretty important, right? Since vitamin B-12 is not naturally occurring in the body, you have to get it from your diet or vitamin supplementation. Many animal-based products such as meat, fish, poultry,…