- A water-soluble vitamin (pantothenic acid) destroyed by boiling, found in all animal and plant tissues, especially poultry, liver, fish, eggs, potatoes and whole grains. It is converted to co-enzyme A in the body and as such is involved in all metabolic processes. There is no known toxicity. Lack of the vitamin can cause headaches, fatigue, impaired motor coordination, muscle cramps and gastrointestinal disturbance. Severe deficiency caused the burning feet syndrome observed in prisoners of war in East Asia during World War II.