Naseer, S. ., Hussain, S., & Abid, A. . (2019). Betalain as a Food Colorant: its Sources, Chemistry and Health Benefits: Chemistry of Betalain and its Role as Food Colorant. Proceedings of the Pakistan Academy of Sciences: B. Life and Environmental Sciences, 56(2), 01–08. Retrieved from http://ppaspk.org/index.php/PPAS-B/article/view/132