Vitamin A: Essential Nutrient for Vision, Immunity, and Overall Health

Vitamin A is a vital fat-soluble nutrient that plays an important role in maintaining vision, immunity, reproduction, growth, and the healthy functioning of major organs such as the heart, lungs, and kidneys. Despite its importance, vitamin A intake varies across populations, with deficiencies still prevalent in some parts of the world. Understanding its sources, functions, and safe intake is key to promoting long-term health.

- DR ANISH DESAI

Vitamin A exists in two primary forms: preformed vitamin A (retinol and retinyl esters) from animal sources, and provitamin A carotenoids, such as beta-carotene, from plant sources. Once ingested, the body converts these forms into retinol, the active compound that supports cellular communication, tissue development, and the production of rhodopsin a protein critical for night vision. Without adequate vitamin A, individuals can develop vision problems, weakened immunity, and in severe cases, blindness.

Dietary Sources of Vitamin A