Purple sweet potato color (PSPC) is a natural anthocyaninfood coloring[1][2][3][4] obtained from the sweet potato (Ipomoea batatas). Some cultivars, like the Ayamurasaki, released in Japan in 1995, are specially developed to have a higher anthocyanin content.[5]
^ abcdWu, Dong-mei; Lu, Jun; Zheng, Yuan-lin; Zhou, Zhong; Shan, Qun; Ma, Dai-fu (2008-07-01). "Purple sweet potato color repairs d-galactose-induced spatial learning and memory impairment by regulating the expression of synaptic proteins". Neurobiology of Learning and Memory. 90 (1): 19–27. doi:10.1016/j.nlm.2008.01.010. ISSN1095-9564. PMID18316211. S2CID30267338.
^Yoshimoto, M.; Okuno, S.; Yoshinaga, M.; Yamakawa, O.; Yamaguchi, M.; Yamada, J. (1999-03-01). "Antimutagenicity of sweetpotato (Ipomoea batatas) roots". Bioscience, Biotechnology, and Biochemistry. 63 (3): 537–541. doi:10.1271/bbb.63.537. ISSN0916-8451. PMID10227139.
^ abcdefghiTruong, Van-Den; Deighton, Nigel; Thompson, Roger T.; McFeeters, Roger F.; Dean, Lisa O.; Pecota, Kenneth V.; Yencho, G. Craig (2010-01-13). "Characterization of Anthocyanins and Anthocyanidins in Purple-Fleshed Sweetpotatoes by HPLC-DAD/ESI-MS/MS". Journal of Agricultural and Food Chemistry. 58 (1): 404–410. doi:10.1021/jf902799a. ISSN0021-8561. PMID20017481.
^ abcdeQiu, Fan; Luo, Jianguang; Yao, Shun; Ma, Li; Kong, Lingyi (2009-06-01). "Preparative isolation and purification of anthocyanins from purple sweet potato by high-speed counter-current chromatography". Journal of Separation Science. 32 (12): 2146–2151. doi:10.1002/jssc.200900038. ISSN1615-9314. PMID19479751.