Vitamin A Toxicity: How to Avoid Overconsumption

Vitamin A occurs naturally in two forms: retinol and provitamin A carotenoids.

Retinol is found in animal sources, such as liver, dairy products, and oily fish. 

Provitamin A carotenoids are found in plant sources, such as dark green leafy vegetables, orange and yellow fruits and vegetables (such as carrots, sweet potatoes, and pumpkin), and some fortified foods. 

The body can convert provitamin A carotenoids into retinol, which is the active form of vitamin A used by the body.

 It's important to note that excessive intake of vitamin A from animal sources can lead to toxicity, while excess intake of provitamin A carotenoids from plant sources does not usually lead to toxicity, as the body can only convert as much provitamin A carotenoids to retinol as it needs.