... 4 No additive or preservtive Roasted sweet potato is made of good quality sweet potato and suger only. it belongs to ... the intestinal peristalsis, facilitatebowel movement. When people see sweet potato sweet potato cut the skin with a white liquid leakage, with ... and magnesium, can prevent osteoporosis;4, Anti-cancer: sweet potato contains an anticancer substance, to prevention of colon cancer ...