Beriberi: Causes, Symptoms & Treatment
Beriberi is a deficiency disease caused by a severe lack of Vitamin B1 (thiamine), which can damage the nervous system, heart, and muscles.
Things worth knowing about "Beriberi"
Beriberi is a deficiency disease caused by a severe lack of Vitamin B1 (thiamine), which can damage the nervous system, heart, and muscles.
What is Beriberi?
Beriberi is a serious nutritional deficiency disease caused by a lack of Vitamin B1 (thiamine). Thiamine is an essential vitamin that the body requires for energy metabolism from carbohydrates and for the normal functioning of nerves, the heart, and muscles. The name “beriberi” originates from Sinhalese and roughly translates to “I cannot, I cannot,” referring to the debilitating weakness the disease causes.
Causes
Beriberi develops when the body does not receive sufficient thiamine over an extended period. Common causes include:
- Diet based primarily on polished white rice (especially in South and Southeast Asia)
- Chronic alcohol abuse (reduces thiamine absorption and increases its consumption)
- Long-term inadequate or unbalanced diet
- Increased demand, e.g. during pregnancy or breastfeeding
- Malabsorption conditions (e.g. Crohn's disease, chronic diarrhea)
- Prolonged parenteral nutrition without thiamine supplementation
Forms of Beriberi
Dry Beriberi (Neurological Form)
Dry beriberi primarily affects the nervous system, leading to peripheral neuropathy -- damage to the peripheral nerves. Typical symptoms include tingling and numbness in the hands and feet, muscle weakness, and in severe cases, paralysis.
Wet Beriberi (Cardiovascular Form)
Wet beriberi mainly affects the cardiovascular system. It can lead to dilated cardiomyopathy (enlargement of the heart with reduced pumping function) and edema (fluid retention), particularly in the legs. In severe cases, heart failure may occur.
Wernicke Encephalopathy and Korsakoff Syndrome
In cases of acute, severe thiamine deficiency -- most commonly in individuals with alcohol dependence -- Wernicke encephalopathy can develop. This condition presents with confusion, eye movement disturbances, and loss of balance. If left untreated, it may progress to the chronic Korsakoff syndrome, characterized by significant memory impairment.
Infantile Beriberi
Infants who are breastfed by mothers with thiamine deficiency can also develop the condition. Infantile beriberi typically occurs between 2 and 6 months of age and may present as heart failure, loss of voice, and seizures.
Symptoms
- Muscle weakness and fatigue
- Tingling, numbness, or burning sensations in the limbs
- Balance and gait disturbances
- Edema (fluid retention), especially in the legs
- Rapid heartbeat, shortness of breath, and heart failure (in wet beriberi)
- Confusion and memory problems (in Wernicke encephalopathy)
Diagnosis
The diagnosis of beriberi is based on clinical symptoms, dietary and medical history, and laboratory tests. The thiamine level in the blood can be measured; the activity of erythrocyte transketolase is often used as an indirect marker of thiamine status. Imaging methods (MRI) may be used when Wernicke encephalopathy is suspected.
Treatment
Treatment consists of prompt administration of thiamine (Vitamin B1). In mild cases, oral supplementation is sufficient; in severe cases -- particularly Wernicke encephalopathy -- thiamine is given intravenously or intramuscularly. When treated promptly, symptoms are often largely reversible. Dietary adjustments favoring thiamine-rich foods (whole grains, legumes, lean meats) are also recommended. In cases of alcohol dependence, comprehensive treatment including detoxification is necessary.
Prevention
Beriberi can be effectively prevented through a balanced diet rich in thiamine. In many countries, white flour and white rice are enriched with thiamine through food fortification. Risk groups (pregnant women, individuals with alcohol dependence, people with malabsorption syndromes) should ensure adequate intake and consider supplementation if necessary.
References
- World Health Organization (WHO): Thiamine deficiency and its prevention and control in major emergencies. WHO/NHD/99.13. Geneva, 1999.
- Lonsdale D. - A review of the biochemistry, metabolism and clinical benefits of thiamin(e) and its derivatives. Evidence-Based Complementary and Alternative Medicine. 2006;3(1):49-59.
- Attaluri P, Castillo A, Edriss H, Nugent K. - Thiamine deficiency: An important consideration in critically ill patients. The American Journal of the Medical Sciences. 2018;356(4):382-390.
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