Costus afer Possesses Carbohydrate Hydrolyzing Enzymes Inhibitory Activity and Antioxidant Capacity In Vitro

Table 3

Inhibitory concentration (IC₅₀ (mg/mL)) of effective extracts of C. afer on α-amylase and α-glucosidase.

Plants parts/standard	Solvent extracts	α-Amylase	α-Glucosidase
Standard	Acarbose	3.92 ± 0.23	0.12 ± 0.06
Leaf	HEX	0.78 ± 0.10^a	32.8 ± 1.22^b
	EA	0.77 ± 0.08^a	26.21 ± 0.43^b
	MeOH	4.34 ± 1.08^b	5.99 ± 0.07^a
	H2O	4.91 ± 0.42^b	176.88 ± 18.43^c
Stem	HEX	0.99 ± 0.24^b	124.88 ± 17.59^c
	EA	1.74 ± 0.34^c	49.23 ± 0.93^b
	MeOH	0.65 ± 0.24^a,b	6.31 ± 0.23^a
	H2O	0.49 ± 0.08^a	166.64 ± 9.41^d
Rhizome	HEX	2.29 ± 0.42^c	78.57 ± 6.3^d
	EA	0.10 ± 0.01^a	33.35 ± 2.09^c
	MeOH	1.78 ± 0.04^b,c	8.02 ± 0.02^a
	H2O	1.42 ± 0.42^b	14.62 ± 0.46^b

Solvents effect on inhibitory concentration of plant parts. Means with different letters (a, b, c, and d) within a column of the same plant part are significantly different from each other at .