5.3 Vitamin Deficiency Diseases

(a) Goiter:

Goiter refers to the swelling of the thyroid gland, which can be caused by various factors such as tumors, cancer, or inflammation. However, not all thyroid swellings are goiters. The primary cause of goiter is iodine deficiency, particularly in regions far from the sea (like North Bengal and hilly areas), where the soil has less iodine. The deficiency of iodine affects the thyroid gland, leading to its enlargement, a common symptom of goiter.

(b) Night Blindness (Xerophthalmia):

Night blindness is the early stage of xerophthalmia, which results from a deficiency of Vitamin A. This condition, commonly seen in children aged 2-5 years, damages the sensory rod cells in the eyes, impairing vision in dim light. If untreated, it can worsen, leading to corneal clouding. To prevent and treat night blindness, vitamin A-rich foods such as fish liver oil, liver, green vegetables, yellow/orange fruits (mango, banana, pumpkin, carrot), and fish (mola and dhela) should be consumed. In severe cases, vitamin A supplements or medications may be required.

(c) Rickets:

Rickets is caused by a deficiency in Vitamin D, which is essential for the absorption of calcium and phosphorus in the body. Without sufficient Vitamin D, bones become weak and can bend, particularly in the legs. This condition is common in children. Rickets can be prevented by ensuring adequate intake of Vitamin D from sources like milk, butter, eggs, and cod liver oil. Exposure to sunlight also helps the body produce Vitamin D. For children, it’s important to ensure they receive Vitamin D-enriched foods and some sunlight, while avoiding conditions that prevent Vitamin D synthesis, such as wearing dark or covering clothing regularly.

(d) Anemia:

Anemia occurs when the level of hemoglobin in the blood is lower than normal, leading to fatigue and weakness. It commonly affects children, females (especially during reproductive years), and pregnant women in Bangladesh. The primary cause is iron deficiency, although other nutrients like folic acid or Vitamin B12 may also be involved. Anemia can also result from blood loss, worms, or poor absorption of iron. Symptoms include weakness, headache, insomnia, loss of appetite, and palpitations. To prevent anemia, it is crucial to consume iron-rich foods such as kidney beans, liver, meat, eggs, lentils, and molasses. In some cases, iron supplements may be needed, but only under medical supervision, as improper treatment can worsen conditions like thalassemia.