Nuclear Retinoid Receptors

Deficiency of Vitamin A Nyctalopia Decreased mucus

production Leading to bacterial

invasion in the eye Conjunctival xerosis Bitot’s spots Keratomatacia

Xerophthalmia

Toxicity of Vitamin A

Vitamin D

Vitamin D Synthesis

Functions of Vitamin D Regulate blood calcium level

Deficiency

Osteomalacia

Rickets

Osteoporosis

Vitamin E

Vitamin E, An Antioxidant

Vitamin K

Vitamin K and the Coagulation Process