The disease beriberi is caused by the deficiency of which vitamin?
Thiamine deficiency beriberi. Sun Simiao (581–682 CE) was the first person in medical history to document the diagnosis, treatment, and prevention of beriberi (leg edema due to vitamin B1 deficiency), a deficiency disease caused by lack of vitamin B1. For this, he prescribed combinations of herbs rich in vitamin B1 and unpolished rice (the outer layer of rice and other grains rich in B vitamins). In the late 19th century, beriberi was studied by Takaki Kanehiro, a British-trained Japanese medical doctor of the Japanese Navy. Beriberi was a serious problem in the Japanese navy: Sailors fell ill an average of four times
Vitamin deficiency and vitamin K deficiency. In the medical literature, any of these may also be called by names on the pattern of "hypovitaminosis" or "avitaminosis" + "[letter of vitamin]", for example, hypovitaminosis A, hypovitaminosis C, hypovitaminosis D. Conversely hypervitaminosis is the syndrome of symptoms caused by over-retention of fat-soluble vitamins in the body. Vitamin deficiency A vitamin deficiency can cause a disease or syndrome known as an avitaminosis or hypovitaminosis. This usually refers to a long-term deficiency of a vitamin. When caused by inadequate nutrition it can be classed as a "primary deficiency", and when due to an underlying disorder such