Vitamin A

Vitamin A is a group of fat-soluble nutrients that play an important role in the body's functions. It is particularly known for its importance to vision, as it helps maintain a healthy cornea and retina. It is also essential for a healthy immune system and helps protect the body from infections. Additionally, vitamin A is important for healthy skin, as it helps regulate oil production and supports the growth and repair of skin cells.

The recommended daily intake of vitamin A varies depending on age and gender.

Men: 900 mg/day
Women: 700 mg/day

Pregnant and breastfeeding women should increase their intake, as vitamin A is essential for the healthy development of the fetus and can be transferred to breast milk.

Individuals at risk for vitamin A deficiency may include:

People who suffer from malabsorption, such as Crohn's disease, may have reduced absorption of vitamin A from food.
Individuals with liver diseases may also have an increased risk of developing a deficiency, as the liver plays an important role in storing and releasing vitamin A.

Symptoms of vitamin A deficiency may initially feel like:

Fatigue
Decreased muscle strength
Decreased appetite

Over time, it can lead to:
Decreased vision
Dry eyes
Decreased immune system function
Decreased skin and hair growth
Decreased reproductive ability.

Prolonged deficiency can also lead to night blindness or xerophthalmia, which can cause permanent vision loss.