Eating sweet potatoes regularly helps to maintain the normal folic acid level of the human body, and low folic acid content in the body will increase the risk of cancer. Sweet potato has high dietary fiber content, which can promote gastrointestinal peristalsis and prevent constipation and colorectal cancer.

First of all, sweet potato

Sweet potato (English: sweet potato), scientific name: sweet potato (sweet potato? Batata? Lin. ) Also known as sweet potato, sweet potato, sweet potato, sweet potato, sweet potato (North), sweet potato (multiple dialects), sweet potato, sweet potato, sweet potato, Zhu potato, pillow potato, Pange, sweet potato, fennel sweet potato and red skin.

Sweet potato belongs to the family Convolvulaceae of the genus Panicum, which is more than 2 meters long and lies on the ground. Its leaves are usually wide oval, 4- 13 cm long and 3- 13 cm wide. Corolla pink, white, lavender or purple, bell-shaped or funnel-shaped, 3-4 cm long, and capsule ovoid or oblate.

Sweet potato is rich in protein, starch, pectin, cellulose, amino acids, vitamins and various minerals, and has the reputation of "longevity food". The sugar content reached 15%-20%. Has anticancer, heart protecting, emphysema and diabetes preventing, and weight reducing effects. Li Shizhen's Compendium of Materia Medica in Ming Dynasty recorded that "sweet potato can tonify deficiency, strengthen spleen and stimulate appetite, and strengthen kidney yin", and said that people in the sea can eat for a long time. Chinese medicine regards sweet potato as a good medicine.

Second, cancer.

In medicine, cancer refers to a malignant tumor originating from epithelial tissue, which is the most common malignant tumor. Accordingly, malignant tumors originating from mesenchymal tissue are collectively called sarcomas. A few malignant tumors are not named according to the above principles, such as nephroblastoma and malignant teratoma. Generally speaking, "cancer" refers to all malignant tumors. Cancer has the biological characteristics of abnormal cell differentiation and proliferation, uncontrolled growth, invasion and metastasis, etc. Its occurrence is a multi-factor and multi-step complex process, which is divided into three processes: carcinogenesis, cancer promotion and evolution, and is closely related to smoking, infection, occupational exposure, environmental pollution, unreasonable diet and genetic factors.

Third, folic acid.

Folic acid, also called vitamin B9, is a water-soluble vitamin.

The Sino-US cooperation project to prevent neural tube defects was launched on 1990, and it was verified by the follow-up observation of 250,000 newly married women and their pregnancy outcomes by Chinese and American scientists? [1], expectant mothers take 0.4 mg folic acid during pregnancy, and the prevention rate is 85% in areas with high incidence of neural tube defects and 4 1% in areas with low incidence of neural tube defects. This scientific and technological achievement has been widely used and used for reference by more than 50 countries around the world. Folic acid is also used to treat female anemia, but consumers must read the instructions carefully when choosing to buy and make choices according to different situations.

Folic acid, one of vitamin B complexes, is equivalent to pteroyl glutamic acid (PGA). It was extracted and purified from spinach leaves by H.K. Mitchell (1941), so it was named folic acid. It can promote the maturation of young cells in bone marrow. If people lack folic acid, it will cause megaloblastic anemia and leukopenia, which is especially important for pregnant women.