2Suda I, Furuta S, Nishiba Y, et al. ple - colored sweetpotato juice[ J ] (4):3.
3Hepato - protective activity of pur- Sweetpotato Research Front, 1997 Yoshimoto M, Yamakawa O, Suda I. Physiological function of purple colored flesh sweetpotato[ J]. Food Processing,1998,33(8) : 15 - 17.