Question

What do you know about vitamin A? Write the effects of deficiency and excess of it.

Answer 1

Vitamin A is a group of unsaturated nutritional organic compounds that includes retinol, retinal, retinoic acid, and several provitamin A carotenoids. Vitamin A has multiple functions: it is important for growth and development, for the maintenance of the immune system and good vision. 
Other causes of vitamin A deficiency are inadequate intake, fat malabsorption, or liver disorders. Deficiency impairs immunity and hematopoiesis and causes rashes and typical ocular effects (e.g., xerophthalmia, night blindness).

Answer 2

Dear Student,

◆ Vitamin A -

• Chemical name of vitamin A is retinol.
• Other active forms include retinal, retinoic acid, provitamin A.
• Vitamin A is essential for colour vision and night vision.
• It helps in immune function, acts as antioxidant.

# Deficiency of vitamin A -

• Night blindness
• Xerosis
• Hyperkerosis
• Keratomalacia
• Impaired immune function

# Excess vitamin A -

• Anorexia
• Bone pain
• Raised ICT
• Pruritus
• Teratogenic

Thanks dear. Hope this helps you...