“…Anthocyanins and their aglycons, anthocyanidins, have various biological effects, such as antioxidative activity (Cao et al, 1997;Kahkonen and Heinonen, 2003;Rahman et al, 2006;Tsuda et al, 1999a), anti-hyperglycemic activity (Matsui et al, 2002), anti-inflammatory activity (Karlsen et al, 2007;Wang et al, 2008b), cell protective activity (Elisia and Kitts, 2008;Tarozzi et al, 2007) and antitumor activity (Hou, 2003;Lala et al, 2006;Kang et al, 2003). One major anthocyanidin is cyanidin, and the effects of cyanidin and cyanin, its glycoside, have been investigated, but the biological effects of these compounds are not fully understood.…”