Vitamin B5 or Pantothenic Acid is a water soluble Vitamin. It plays a vital role in the breakdown of food for energy. It is involved in the production of Red Blood Cells and sex related hormones.
Deficiency of this Vitamin is rare. It is widely distributed in all plant and animal foods. The ones at the risk of Vitamin B 5 can be Alcoholics, Diabetics and people with malabsorption syndrome.

Daily requirement of Vitamin B5 in the body
0 to 6 months : 1.7 mg
7 to 12 months : 1.8 mg
1 to 3 years : 2 mg
4 to 8 years : 3 mg
9 to 13 years : 4 mg
14 to 18 years : 5 mg
Above 18 years : 5 mg
Pregnant / Lactating : 6 / 7 mg

Functions of Vitamin B5 in the body.
Vitamin B5 contains Pantethine. Pantethine is a derivative of the Pantothenic acid. It is known for lowering the Cholesterol levels in the body. It is useful in lowering the LDL cholesterol and raising the HDL cholesterol.
Vitamin B5 speeds up the wound healing process. It plays a major role in Wound healing post surgery. Vitamin B5 reduces pain and stiffness in Rheumatoid Arthritis. A person with RA is usually found deficient in Vitamin B5. Some more functions of Vitamin B5 are :
Production of RBC and Sexual hormones
Makes the body use Vitamin B2 better
Strengthens the Digestive Tract

Deficiency of Vitamin B5 causes
Fatigue
Insomnia
Vomiting
Confusion
Depression
Depression
Stomach Pain
Burning Feet
Irritability
Hypoglycemia
Muscle cramps
Plantar Fasciitis
Infections of the Upper Respiratory tract

Excess of Vitamin B5 causes
Excess of Vitamin B5 in the body leads to Diarrhea, Nausea and Heartburn. Overdose of Vitamin B5 may cause Edema and Joint pain. The rise in the levels of triglycerides is linked with high dosage of Vitamin C. It leads to calcification in the arteries.