Thiamine deficiency

Our bodies need a special kind of food to stay well. Without it, we can get very sick. This sickness is called beriberi.

Some people feel very weak. Their legs might hurt or feel numb. They may have trouble walking.

Other people have heart problems. Their hearts might beat too fast. Their legs might even swell up.

Babies can get sick too. They might lose weight or feel very ill. This can happen if their mothers do not eat enough.

Doctors can help people feel better. They give the special food to the body. Most people feel better in a few weeks.

Our bodies need thiamine to stay healthy. Thiamine is a type of vitamin called B1. If we do not get enough, we can get sick. This sickness is called beriberi.

There are different ways beriberi affects the body. Dry beriberi affects the nerves. This can cause numbness in the hands and feet. It can also cause pain or trouble walking. Some people may feel confused.

Wet beriberi affects the heart and blood. It can make the heart beat very fast. It can also cause legs to swell up. This is called edema.

Babies can also get sick. This is called infantile beriberi. It can happen if a mother does not eat enough thiamine. Babies may lose weight or feel very ill.

Some people are at higher risk. Eating mostly white rice can cause it. Alcoholism can also lead to low thiamine. In rare cases, a person's genes may make it hard to use thiamine.

Doctors can test for this. They look at symptoms or check blood and urine. Most people feel better after taking thiamine. They can take it by mouth or by injection.

Thiamine is a vitamin known as B1 that our bodies need to stay healthy. When a person does not get enough thiamine, it causes a medical condition. A severe and long-lasting form of this sickness is called beriberi.

The name beriberi may come from an 18th-century phrase meaning "I cannot, I cannot." This name describes the great weakness people feel when they are sick. It is a serious matter because thiamine helps our bodies turn food into energy.

This condition works by disrupting how our cells use energy. Thiamine turns into a helper called thiamine pyrophosphate, or TPP. This helper is part of a central pathway called the citric acid cycle. This cycle is the main way our bodies manage sugars, fats, and proteins. Without enough TPP, the cycle is disrupted. This can stop the body from making important brain signals like glutamic acid and GABA.

History shows that beriberi has been known for thousands of years in Asia. It became more common in the late 1800s. This happened because people began processing rice more often. Processing rice can remove the thiamine that is usually found in the grain. Today, thiamine deficiency is rare in most developed parts of the world. However, it is still common in sub-Saharan Africa and in refugee camps.

There are several different types of beriberi. Dry beriberi affects the nerves and can cause numbness or trouble walking. It can also lead to brain issues like Wernicke's encephalopathy or Korsakoff syndrome. Wet beriberi affects the heart and the way blood moves. It can cause a fast heart rate and swelling called edema.

There is also gastrointestinal beriberi, which was recognized in 2004. This type affects the digestive system and causes stomach pain. Finally, infantile beriberi affects babies, often because their mothers did not have enough thiamine.

Doctors can find this condition by looking at symptoms or testing urine and blood. They might check for high levels of lactic acid. One way to test is by looking at how an enzyme called transketolase works in red blood cells.

Once found, the treatment is usually thiamine supplements. These can be taken by mouth or through an injection. Most people feel much better within a few weeks of starting treatment. To help everyone, many places add thiamine to food to prevent the sickness from starting.

Thiamine deficiency is a medical condition caused by low levels of thiamine, also known as vitamin B1. When this deficiency becomes severe and chronic, it results in a disease known as beriberi. The name beriberi may have originated in the 18th century from the Sinhalese phrase "bæri bæri," which means "I cannot, I cannot." This name reflects the extreme physical weakness felt by those suffering from the condition.

To understand how this deficiency works, we must look at how cells produce energy. Thiamine is converted in the body into a derivative called thiamine pyrophosphate, or TPP. This TPP acts as a cofactor, which is a helper molecule, in the citric acid cycle. The citric acid cycle is a central metabolic pathway that regulates the metabolism of carbohydrates, lipids, and amino acids. When thiamine is low, this cycle is disrupted. This disruption inhibits the production of many vital molecules, including the neurotransmitters glutamic acid and GABA.

Beriberi is categorized into four distinct types based on which bodily systems are affected. Dry beriberi primarily targets the peripheral nervous system. It can cause wasting, partial paralysis, and difficulty walking. It may also result in sensory issues like numbness or tingling in the hands and feet. Wet beriberi affects the cardiovascular system and other bodily systems. This type can cause a fast heart rate and edema, which is the swelling of bodily tissues.

Two other types provide even more specific medical categories. Gastrointestinal beriberi was recognized in 2004 and specifically affects the digestive system, causing abdominal pain, nausea, and vomiting. Infantile beriberi occurs in babies, usually between two and six months of age. This often happens to children whose mothers had inadequate thiamine intake. In its acute form, infantile beriberi can cause a baby to develop cyanosis, a bluish skin color, and can lead to heart failure.

Dry beriberi is also closely linked to specific brain diseases. Wernicke's encephalopathy is a neuropsychiatric disorder characterized by abnormal eye movements, an abnormal gait, and deranged mental function. Korsakoff syndrome, sometimes called alcohol amnestic disorder, can occur as brain function deteriorates following Wernicke's encephalopathy. This syndrome is characterized by amnesia, which is a loss of memory, and a decrease in spontaneity or initiative.

History shows that thiamine deficiency has been described in Asia for thousands of years. However, it became more common in the late 1800s due to increased rice processing. This processing can remove the thiamine found in the grain. While rare in most of the developed world, the condition remains common in sub-Saharan Africa and in refugee camps. Alcoholism is a major risk factor because alcohol can interfere with how the body absorbs and uses thiamine.

Diagnosis involves looking for specific clinical signs and laboratory results. Doctors may check for high blood lactate or low levels of thiamine in the urine. One common test is the erythrocyte transketolase activation assay, which measures the activity of an enzyme in red blood cells. Treatment is straightforward and involves thiamine supplementation via oral doses or injections. Most symptoms generally resolve within a few weeks of starting treatment. On a larger scale, many populations prevent this through the fortification of food, which means adding thiamine back into common staples.