The main cause of beriberi is a diet low in thiamine. The disease is very rare in regions with access to vitamin-enriched foods, such as certain breakfast cereals and breads. Beriberi is most common in regions of the world where the diet includes unenriched, processed white rice, which only has a tenth of the amount of thiamine as brown rice.

Beri-Beri disease is caused due to deficiency of Vitamin B1. To avoid this disease we should take Milk, dal, rice, liver and apple.

Causes of Beri-Beri Disease
1. Deficiency in Thiamine (Vitamin B1)
- Beri-beri disease is primarily caused by a deficiency in thiamine, also known as Vitamin B1. Thiamine plays a crucial role in the body's ability to convert carbohydrates into energy.
2. Poor Diet
- A diet lacking in thiamine-rich foods such as whole grains, legumes, nuts, and lean meats can lead to a deficiency in this essential vitamin. Consuming processed foods that have been stripped of thiamine can also contribute to the development of beri-beri.
3. Alcoholism
- Chronic alcohol consumption can interfere with the absorption and utilization of thiamine in the body. Alcoholics are at a higher risk of developing beri-beri due to poor dietary choices and impaired thiamine metabolism.
4. Medical Conditions
- Certain medical conditions such as gastrointestinal disorders, HIV/AIDS, and hyperthyroidism can impair thiamine absorption and utilization, leading to a deficiency that can result in beri-beri.
5. Pregnancy
- Pregnant women have an increased need for thiamine to support the growth and development of the fetus. Inadequate intake of thiamine during pregnancy can result in beri-beri in both the mother and the unborn child.
6. Genetic Factors
- Some individuals may have a genetic predisposition that makes them more susceptible to developing beri-beri even with an adequate intake of thiamine. Genetic variations in thiamine metabolism can increase the risk of deficiency.
In conclusion, beri-beri disease is primarily caused by a deficiency in thiamine, which can result from factors such as poor diet, alcoholism, certain medical conditions, pregnancy, and genetic factors. It is essential to consume a balanced diet rich in thiamine-containing foods to prevent the development of beri-beri.