As discussed, vitamin B12 is responsible for many functions in our body. For instance, it helps in the formation of red blood cells. Without enough red blood cells, our body’s tissues and organs do not get enough oxygen. This in turn results in weak muscles, numbness, trouble walking, nausea, weight loss, irritability, fatigue, and increased heart rate.
Furthermore, low levels of vitamin B12 also affects our nerve and brain health, leading to neurological symptoms that include vision problems, numbness and tingling in the hands and feet, difficulty in remembering things or focusing and more. One may even feel depressed, irritated and experience changes in mood and behaviour.