Feeling very tired may indicate signs of pernicious anemia caused by vitamin B12 deficiency, according to British Experts.
Rapid heartbeat, headaches, decreased appetite, pain in the mouth and tongue, and shortness of breath with light exertion also indicate the presence of a dangerous disease, experts say.
“Pernicious anaemia is an autoimmune disease, caused by antibodies from your immune system attacking your own body tissue, which it mistakes as being foreign. This causes inflammation in the lining of your stomach,” they further added.
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“Normally, a protein known as intrinsic factor, which is made in your stomach, attaches to the vitamin B12 released from the food you have eaten and then carries the vitamin through your bowel wall into your blood.
“If you have pernicious anaemia, the stomach cells that produce intrinsic factor may be damaged, meaning vitamin B12 can no longer be absorbed and a deficiency develops, leading to anaemia,” according to experts.
According to doctors, adults between the ages of 19 and 64 need about 1.5 milligrams of B12 per day. You can get your daily dose of vitamin through food. Specifically, beef, eggs, fortified cereals, and salmon are rich in B12.
B12 is a water-soluble vitamin also called cobalamin. It is not only responsible for the functioning of the nervous system, but is involved in the production of red blood cells and DNA. A deficiency of this nutrient can damage nerves and cause tingling and numbness in the arms and legs, muscle weakness, and loss of reflexes.
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Pernicious anemia is a disease caused by impaired blood formation due to a lack of vitamin B12 in the body. Bone marrow and tissues of the nervous system are especially sensitive to the deficiency of this vitamin.