First of all, under the popularization of science, carotene, which is the abbreviation of "carotenoid", is divided into two categories: "carotene" and "xanthophyll" contain more than 700 substances, and there are more than 400 named Kinds of natural pigments with colors ranging from yellow to red, including the well-known α-carotene, β-carotene, lutein, lycopene, zeaxanthin, capsanthin, etc. Carotenoids are fat-soluble vitamins It is an indispensable nutrient for the human body. Humans cannot produce carotene by themselves, and can only be taken from outside. Generally, the darker and brighter fruits and vegetables contain carotenoids.
The carotene currently on the market is mainly divided into chemical synthesis, chemical extraction and physical extraction. Chemical synthesis and chemical extraction are more common. They are usually tablets or capsules. The ingredients are clearly marked in the list of chemical ingredients, such as: beta-carotene, lutein, and chemical synthesis is called retinol. Natural carotenoid extraction seems to be only done by the Agricultural Resource Center of the Institute of Genetics and Development of the Chinese Academy of Sciences. During the Beijing Olympics, a product "carotene microecological nutrient solution" seems to solve athletes' stomach pain and diarrhea. If you are interested, you can check it online.
Since chemical synthesis and chemical extraction are a certain chemical substance in carotenoids, this kind of health products or tablets have side effects. Beta-carotene tablets increase the risk of lung cancer in heavy smokers, especially those who smoke a pack of cigarettes or more a day, and smokers who drink a glass of alcohol a day have a higher risk of lung cancer. Beta-carotene tablets and vitamin E will not reduce the risk of lung cancer. For other side effects, you can search the National Food Additives Regulations and the Western Medicine Department of the Pharmacopoeia on the Internet, which clearly indicate the safe usage and side effects of various chemical carotenes.
All in all, it is safest and most effective to eat more fruits and vegetables rich in carotenoids.