With proper intake of vitamin A, the human body can directly ingest vitamin A from animal foods, such as animal liver and egg yolk, but these foods are easy to get tired of eating, and some saturated fatty acids and cholesterol are inevitably ingested, while carotene intake from vegetables and fruits does not have this disadvantage. It is very safe to use as much carotene as possible in the process of human metabolism.

Vegetables rich in beta-carotene include spinach, alfalfa, cabbage, cress, oranges, oranges and apricots. The amount of β -carotene contained in various foods can vary with seasons and maturity. If you often have green, red or yellow vegetables at home and orange fruits in the fruit bowl, you will not be short of beta-carotene.