Table 1.

The IC₅₀ values of GTE, GTP, EGCG alone and their combination with acarbose on inhibiting α-glucosidase activity.

Components	IC50 (μg/mL)
	Single	Combined
GTE	4.421 ± 0.018 *	2.104 ± 0.007 *
GTP	10.019 ± 0.017 *	3.999 ± 0.006 *
EGCG	5.272 ± 0.009 *	2.083 ± 0.004 *
Acarbose	4,822.783 ± 26.042	2,291.587 ± 13.014 *† (GTE)
		1,925.614 ± 9.875 *† (GTP)
		1,906.454 ± 6.892 *† (EGCG)

* Indicates significant difference (p < 0.05) from the positive control of acarbose alone. ^† indicates IC₅₀ of acarbose independent of other components (GTE, GTP, and EGCG respectively) in combined study. IC₅₀: half maximal inhibitory concentration.