Vitamin A deficiency impairs vision, immunity, and skin health, often starting subtly before progressing to severe issues.
Early Symptoms
Night blindness is typically the first sign, making it hard to see in low light due to disrupted retinal function. Dry eyes (xerophthalmia) follow, with reduced tear production leading to irritation, foamy Bitot's spots on the eye whites, and potential corneal damage.
Advanced Effects
Severe deficiency causes corneal ulcers, clouding (keratomalacia), and permanent blindness, especially in children. Skin becomes dry, scaly, and rough (keratosis pilaris); hair thins; and wounds heal slowly. Immunity weakens, raising risks of respiratory/chest infections, diarrhea, and measles complications.
Long-Term Risks
Growth stunting and developmental delays occur in kids; adults face infertility, fatigue, and higher mortality from infections. It's prevalent in malnutrition areas but reversible early with diet or supplements like liver, carrots, and greens.
| Severity | Key Signs |
|---|---|
| Mild | Night blindness, dry eyes |
| Moderate | Bitot spots, skin scaling |
| Severe | Blindness, infections |
0 comments