β- carotene is one of carotenoids, but also a carotene isomer, is widely present in the animal and plant leaves, flowers, roots. It is a multi-olefin, all the conjugated double bonds are involved, the name of the β- mark that is, from the ring double bond conjugated to the position derived. β-carotene is a powerful antioxidant, is the dominant carotenoid family members. A total of about 600 kinds of carotenoids, are dark green leafy vegetables and yellow and orange fruits and vegetables ingredients. β-carotene is different from the other members of this family place that it is the precursor of vitamin A, which means that as long as the body needs, it will be transformed into vitamin A.
According to many studies have shown that eating foods rich in β-carotene people, low probability of breast cancer, colon cancer and colorectal cancer are. Moreover, recent studies have pointed out that high consumption of β-carotene content of fruits and vegetables can reduce the prevalence of coronary artery disease. In all plant compounds, β-carotene is one of the most widely used by people who study. Many studies have shown that diets rich in β-carotene intake than those who did not ingest than those Easy to cancer and cardiovascular disease. Medical journals around the world are full of such research reports: low β-carotene intake and blood β-carotene content is low with many different types of cancer has been associated with increased morbidity. These cancers include breast cancer, cervical cancer, lung cancer, stomach cancer, colorectal cancer, bladder cancer, oral cancer and esophageal cancer. For example, in Buffalo, New York from a recent study by researchers discovered done, the concentration of women suffering from breast cancer of plasma β-carotene are much lower than those who did not breast