D3SE	Delphinidin-3-O-sambubioside equivalent
GAE	Gallic acid equivalent
GC-MS	Gas chromatography-mass spectrometry
HS-6	50% EtOH extract of Taitung No. 6 roselle leaves
HS-6A	Acidified 50% EtOH extract of Taitung No. 6 roselle leaves
HS-3	50% EtOH extract of Taitung No. 3 roselle leaves
HS-3A	Acidified 50% EtOH extract of Taitung No. 3 roselle leaves
IC50	Half-maximal inhibitory concentration
IR	Insulin resistant
LC-MS/MS	Liquid chromatography–tandem mass spectrometry
PCA	Principal component analysis
RE	Rutin equivalent
TAC	Total anthocyanin content
TFC	Total flavonoid content
TPC	Total phenolic content