A

Roles in vision, growth, reproduction

Night blindness, cornea damage, damage to respiratory and gastrointestinal tract

C (ascorbic acid)

Antioxidant

Scurvy (swollen and bleeding gums, subdermal hemorrhaging)

D

Regulation of calcium and phosphate metabolism

Rickets (children): skeletal deformities, impaired growth

Osteomalacia (adults): soft, bending bones

E

Antioxidant

Lesions in muscles and nerves (rare)

K

Blood coagulation

Subdermal hemorrhaging