Final answer:
Preformed vitamin A includes beta-carotene.
Step-by-step explanation:
True, preformed vitamin A includes beta-carotene. Beta-carotene is a precursor to vitamin A, which means that it is converted into vitamin A in the body. Other sources of preformed vitamin A include retinol and retinal, which are found in animal-based products like liver and dairy products.
Learn more about vitamin A