Pins and Needles
Those who are dealing with a vitamin B12 deficiency may experience a pins and needles sensation. It is similar to the feeling that you get when you lay on your arm or sit on your foot for too long. This feeling of electrical charges throughout your body comes as a result of the red blood cells receiving too little oxygen.
Ashen Skin
If you are dealing with pale skin despite spending a healthy amount of time in the sun, you could have a deficiency of vitamin B12. When there is not enough oxygen in you blood, you will not have that rosy glow that is typically associated with a healthy body and skin. If your skin looks yellow, the red blood cells may be breaking apart because they are too fragile. Jaundice occurs as this breakdown of red blood cells happens and bilirubin is released.