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Vitamin B12 is an essential vitamin, which means that the body needs vitamin B12 to work properly. Vitamin B12 can be found in foods such as meat, fish, dairy products or supplements. When the level of B12 in the blood is too low, a deficiency occurs, causing changes in these three body parts.
The health website continues: "This happens on the edge of the tongue, along one side or the other or at the tip.
"Some people feel tingling, pain, or tingling instead of itching, which may be a sign of B12 deficiency."
When the lack causes damage to the optic nerve leading to the eye, vision changes occur.
Due to this damage, the nerve signals transmitted from the eyes to the brain are disturbed, resulting in impaired vision.
Damage to the nervous system can cause changes in the way you walk and move, which can affect a person's balance and coordination.
Changes in the way you walk and move do not necessarily mean that you are deficient in vitamin B12, but you may need to check it just in case.
The website added: "The recommended dietary intake (RDAs) for vitamin B12 is 1.8 micrograms, and for older children and adults, 2.4 micrograms; pregnant women, 2.6 micrograms; and breastfeeding women, 2.8 micrograms.
"Because 10% to 30% of elderly people cannot effectively absorb vitamin B12 in food, people over 50 should meet the RDA by eating B12-rich foods or taking vitamin B12 supplements.
"Supplement of 25-100 micrograms per day has been used to maintain vitamin B12 levels in the elderly."
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