Table 4.
Combination index (CI) value between mixtures consisting of two polyphenols on thyroid peroxidase activity, n = 9.
| Compound | Ferulic Acid | trans–Cinnamic Acid | Syringic Acid |
|---|---|---|---|
| Ferulic acid | - | 0.98 ± 0.06 a Nearly additive |
0.24 ± 0.05 c Strong synergism |
| trans–cinnamic acid | 0.98 ± 0.06 a Nearly additive |
- | 0.46 ± 0.04 b Synergism |
| Syringic acid | 0.24 ± 0.05 c Strong synergism |
0.46 ± 0.04 b Synergism |
- |
Values are expressed as the mean ± SD; means with different letter superscripts (a–c) in the columns are significantly different (α = 0.05).