Vitamin A

Overview
Vitamin A is a fat-soluble vitamin that plays a fundamental role in maintaining various aspects of human health. It is known for its critical role in supporting vision, particularly in low-light conditions, as it is essential for the formation of a light-sensitive pigment in the retina. Additionally, vitamin A is vital for the proper functioning of the immune system, cell growth and differentiation, and skin health. It can be obtained from dietary sources in two forms: preformed vitamin A (retinol) found in animal products like liver and fish, and provitamin A carotenoids (such as beta-carotene) found in colorful fruits and vegetables. Vitamin A deficiency can lead to a range of health issues, including night blindness and weakened immunity. Conversely, excessive intake of vitamin A through supplements can be harmful, so maintaining a balanced and varied diet is essential to ensure adequate but not excessive vitamin A intake.

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