Vitamin A deficiency is associated with which condition?

Vitamin A deficiency is associated with which condition?

• A. Night blindness
• B. Rickets
• C. Anemia
• D. Osteoporosis

Answer: (A)

Vision in low light depends on a pigment in retinal rods called rhodopsin, which requires a vitamin A–derived component to regenerate after light exposure. When vitamin A is deficient, rhodopsin regeneration slows, and the eye struggles to adapt to darkness, producing night blindness. This is one of the earliest signs of deficiency and can progress to more severe eye changes if deficiency continues. The other conditions reflect issues with different nutrients and bodily systems (vitamin D and bone health for rickets and osteoporosis; iron or B vitamins for anemia), so they aren’t characteristically linked to vitamin A deficiency in the same way.

Vision in low light depends on a pigment in retinal rods called rhodopsin, which requires a vitamin A–derived component to regenerate after light exposure. When vitamin A is deficient, rhodopsin regeneration slows, and the eye struggles to adapt to darkness, producing night blindness. This is one of the earliest signs of deficiency and can progress to more severe eye changes if deficiency continues. The other conditions reflect issues with different nutrients and bodily systems (vitamin D and bone health for rickets and osteoporosis; iron or B vitamins for anemia), so they aren’t characteristically linked to vitamin A deficiency in the same way.