beri beri is caused by lack of vitamin
Thiamine deficiency Thiamine deficiency, also known as beriberi, is a condition that occurs due to not enough thiamine (vitamin B1).[1] There are two main types: wet beriberi, and dry beriberi.[1] Wet beriberi results in a fast heart rate, shortness of breath, and leg swelling.[1] Dry beriberi results in numbness of the hands and feet, confusion, trouble moving the legs, and pain.[1] A form with loss of appetite and constipation may also occur.[3]
Folate deficiency Women with folate deficiency who become pregnant are more likely to give birth to low birth weight premature infants, and infants with neural tube defects. In infants and children, folate deficiency can lead to failure to thrive or slow growth rate, diarrhea, oral ulcers, megaloblastic anemia, neurological deterioration. Microcephaly, irritability, developmental delay, seizures, blindness and cerebellar ataxia can also be observed.[4]