Vitamin A is a fat-soluble vitamin that is naturally present in many foods. It is essential for human health and plays a crucial role in vision, immune function, reproduction, and cell communication ^[1].

Vitamin A comes in two forms: preformed vitamin A, found in animal products, and provitamin A, found in fruits and vegetables. The body converts these compounds into the active form of vitamin A, retinol, which interacts with the proteins in the body to support the vitamin's essential functions ^[2].

Vitamin A has numerous health benefits, including:

- Supporting Immune Function: Vitamin A is essential for the functioning of the immune system, as it helps to regulate cellular immune responses and humoral immune processes ^[3].

- Maintaining Healthy Vision: Vitamin A is a component of the protein rhodopsin, which supports the retina to absorb light ^[4].

- Promoting Skin Health: Vitamin A is necessary for the growth and repair of skin tissue, and helps maintain healthy teeth, skeletal and soft tissue, and mucous membranes ^[5].

Vitamin A is generally safe when consumed in recommended amounts, but excessive intake can be harmful, causing symptoms like dizziness, nausea, headaches, skin irritation, and joint or bone pain ^[6]. Always consult a healthcare professional before beginning any new supplement regimen.

Vitamin A can interact with certain medications, including some birth control pills, blood thinners, skin medications, and other vitamins and dietary supplements. Overconsumption of Vitamin A along with these medications can result in harmful effects. Always consult a healthcare professional before starting Vitamin A if you are taking any medications ^[7].

The recommended daily allowance for Vitamin A varies based on age and sex, but generally, it's recommended that men get 900 micrograms and women get 700 micrograms per day ^[8].

Always follow the recommended dosage on your specific supplement and consult with a healthcare professional before starting a new supplement regimen.