Figure 1.

(A) Total amount of phenolic compounds in herbal extracts was measured using Folin-Ciocalteu assay, corresponding to equivalent amount of gallic acid (i.e., GAE in mg/g). (B) Radical scavenging ability was detected by colorimetric reaction in gallic acid. (C) Protection effect of herbal extract to H9C2 cells against oxidative stress, i.e. DPPH scavenging (left) and cell protection against 400 µM tBHP (right). The values are in percentage of control (no treatment) in mean ± SD, n = 4. Statistical difference was made of the sample with the lowest value of corresponding content or indicated, *p < 0.05, **p < 0.01, and ***p < 0.001.