Harada K., Kano M., Takayanagi T., Yamakawa O., Ishikawa F. (2004) Absorption of acylated anthocyanins in rats and humans after ingesting an extract of Ipomoea batatas purple sweet potato tuber. Biosci Biotechnol Biochem 68:1500-7 PubMed (15277754)

Compound Mean content
Anthocyanins, total 27 mg/mL