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

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

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