Activity like walking up the stairs could make you feel wobbly and dizzy. This again results in impaired brain function due to poor supply of oxygen to the brain.
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If you have a rosy complexion and suddenly find you look pale or your skin has taken on a yellowish hue, then a lack of Vitamin B-12 could be the cause. The deficiency causes red blood cells to break easily releasing bilirubin pigment into the skin giving it a yellow hue.
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A normal tongue will never have a smooth red appearance but appear pinkish and feature bumps called papillae. A lack of vitamin B-12 will make you lose the papillae giving the tongue a smooth reddish appearance. Research has also found that some may experience pain at the back of the tongue and because of a loss of papillae; your food may not taste good. The papillae contain your taste buds.
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Lack of vitamin B-12 can result in the optic nerve getting damaged due to lack of oxygen. It can cause the accumulation of red blood cells in the retina leading to double vision, blurry vision and also impaired vision. When you experience such things consult a doctor immediately.
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