The most well-known deficiency disease of recent centuries is scurvy, which is caused by a deficiency of vitamin C. This disease has been recognized for hundreds of years. Vitamin C is required to make collagen, the connective tissue that holds our cells together. A deficiency of this vitamin can cause a breakdown of tendons, ligaments, bones, and blood vessels. It can also cause bruising, bleeding, a loss of hair, tooth loss, and swollen, painful joints. Just 10 milligrams of vitamin C each day will prevent scurvy, though your recommended daily intake is about 90 milligrams depending on gender and age.
I'm going to go take my vitamins right now.