MATERIALS AND METHODS
Plant materials
Fresh fruits of Musa sapientum L. (banana), Citrus maxima (Burm.) Merrill (pomelo),
Chinenesis Sonn (litchi), Dimocarpus Longan Lour. (longan), Garcinia mangostana L.
(mangosteen), Punica granatum (pomegranate) and Nephelium lappaceum (rambutan) were
purchased from a local grocery store in Bangkok, Thailand. The fresh fruits were washed to
remove impurities and peeled. The fruit peels cut into small piece and dried at 45 C for 48 hours
in a try dryer. They were then ground with a blender to make a powder