Adeficiency of this vitamin causes beriberi, which is characterized by weakness, swelling, and tingling or numbness in the hands and feet

Beriberi which is commonly characterized by weakness, swelling, and tingling or numbness in the hands and feet is caused by a deficiency in Vitamin B1, otherwise known as Thiamin, therefore it is also known as Thiamin deficiency. This disease may lead to peripheral neuropathy and heart failure.