Conclusions
These data have significant implications for the use of this sweet potato variant in protection against colorectal cancer.
From https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5624454/#!po=40.7895
Sweet potato peel, which is usually discarded as waste, contains constituents that can serve as dietary components to prevent the development of different types of cancer.
From https://www.ncbi.nlm.nih.gov/pubmed/27673552
還有CNN報道
https://www.cnn.com/2013/10/18/health/food-breast-cancer-survivors/index.html
一位洋人醫生的看法
Sweet potatoes can be considered a superfood. They are one of the healthiest and cheapest vegetables on the planet. (And one day, perhaps, even off the planet, as NASA has chosen the sweet potato for space missions.) A study out of the University of Washington aimed to identify which vegetables provided the most nutrients per dollar. In my video, Anti-Cancer Potential of Sweet Potato Proteins, you can see a graph of affordability versus nutrition for different foods. The healthiest foods, like dark green leafy vegetables, may also be the cheapest, and the highest nutrient-rich food scores per dollar were obtained for sweet potatoes.
Sweet potatoes are not just packed with nutrition but may also have special cancer-fighting properties. In 1931, a unique protein was discovered in sweet potatoes. It turns out that 80% of the protein in sweet potatoes is a type of protease inhibitor with potential anticancer effects. These proteins were originally tested against leukemia and appeared to suppress the growth of leukemia cells in a petri dish.
https://nutritionfacts.org/2015/11/19/sweet-potato-proteins-vs-cancer/