Vitamin B12 Deficiency: Causes, Symptoms, and Treatment

too much B12 in your body can also give you vitiligo, mouth ulcers, eczema, and acne.

B12 deficiency is associated with hair loss, but there’s not enough evidence to show that taking B12 supplements will help hair grow back.

If you have too little B12 in your body, your nails might turn brown-gray or bluish. This should change when you bring your B12 continue reading …