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What is Avitaminosis?

By Dulce Corazon
Updated Mar 03, 2024
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Avitaminosis is the term used for a group of conditions or diseases caused by the chronic or long-term deficiency of one or more vitamins. Vitamins are substances that play various important roles in the growth and development of every human being. There are many kinds of vitamins, among them are Vitamin A, Vitamin C, and Vitamin B, and each one performs different actions inside the body. The manifestation of symptoms usually depends on the kind of vitamin deficiency an individual has. Examples of conditions associated with avitaminosis are pellagra, beriberi, scurvy, rickets, and night blindness.

Pellagra occurs when a person does not consume sufficient amount of niacin in his diet. Niacin or Vitamin B3 is essential for the proper functioning of the nerves, digestive system and the skin. This disease is sometimes called the disease with four Ds because its major symptoms often include diarrhea, dermatitis, dementia — a disease affecting the mental ability of a person — and sometimes death. Other symptoms include rashes, mouth ulcers, vomiting, and tremors.

Beriberi is a condition caused by deficient intake of Vitamin B1 or thiamine. There are two types of beriberi — wet and dry beriberi. Wet beriberi affects the cardiovascular system and dry beriberi affects the nervous system. This type of avitaminosis is commonly seen in individuals who abuse alcohol. Symptoms include pain and swelling of the legs and feet, increased heart rate, tingling sensations, and wasting of the leg muscles.

Scurvy is a disease caused by the long-time deficiency of ascorbic acid or vitamin C. It is characterized by body weakness, inflammation of the gums, anemia, tender joints, and hemorrhages on the skin. There are several groups of individuals who are at high risk for the development of scurvy. These include alcoholics, elderly, children, and patients with mental problems.

Rickets is a nutritional disorder caused by the deficiency of Vitamin D, which controls the production of calcium and phosphate being used by the body. This form of avitaminosis often results in the softening and weakening of the bones of affected children. Children and adults who usually stay indoors have a higher risk of developing Vitamin D deficiency because exposure to sunlight is often needed for its production.

Night blindness is often caused by avitaminosis A, or the lack of Vitamin A. Decreased absorption or intake of Vitamin A usually causes the tear glands to malfunction and eventually results in severe dryness of the eyes, irritation, and night blindness. Vitamin A deficiency is known as the leading cause of blindness among children.

Poor nutrition is often the cause of avitaminosis. There are many food sources available in the market that are rich in vitamins, thus avitaminosis is mostly a preventable disease. On the other hand, when the body retains excess amounts of vitamins, the condition is referred to as hypervitaminosis.

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