Citation:Subasinghe, H. W. A. S., Hettihewa, L. M., Gunawardena, S. & Liyanage, T. (2013). Effect of methanolic extract of Costus speciosus (Thebu) leaf on insulin resistance in Wistar rats: Comparison with pioglitazone. 10th Academic Sessions & Vice – Chancellor’s Awards, University of Ruhuna, Matara, Sri Lanka.