Variation in the metabolites and α-glucosidase inhibitory activity of Cosmos caudatus at different growth stages

Table 3 Total phenolic content (TPC) and α-glucosidase inhibitory activity from different harvesting ages of C. caudatus extracts

Harvesting age (weeks old)	TPC (g GAE g DW⁻¹)	α-glucosidase inhibitory activity, IC₅₀ (μg mL⁻¹)
6	0.24 ± 0.07^a	nd
8	0.25 ± 0.03^a	78.90 ± 0.01^a
10	0.47 ± 0.05^b	24.11 ± 0.03^b
12	0.28 ± 0.04^a	30.50 ± 0.01^c
14	0.34 ± 0.05^a	31.83 ± 0.04^c
Quercetin	nd	110.50 ± 4.30^d

Different letters in a column indicate significant differences (p < 0.05) using Duncan’s test. Values are expressed as the mean ± standard deviation (n = 3). nd not detected

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