Table 2.
Bioactive compounds and antioxidant activity of cactus pear peels.
| Bioactive Compounds and Antioxidant Activity | Ranges | Refs. |
|---|---|---|
| Phenolics (mg GAE/100 g) | 14–376 | [50,57] |
| Flavonoids (mg RE/100 g) | 8–66 | [57] |
| Tannins (mg CE/100 g) | 23–144 | [57] |
| Carotenoids (μg/g) | 1.79–6.06 | [50] |
| Betaxanthins (mg/100 g) | 83.4 | [53] |
| Betacyanins (mg/100 g) | 13,468 | [53] |
| DPPH (%) | 90.9−96.8 | [50] |
| ABTS (µM TE/100 g) | 529 | [50] |
| Chelating activity (%) | 69–97 | [50] |
| Reducing power (EC 50 mg/mL) | 2.08–2.65 | [57] |
| ORAC (µM TE/100 g) | 37.4 | [53] |
| B-Carotene bleaching inhibition (EC 50 mg/mL) | 3.87–6.49 | [57] |
GAE: Gallic Acid Equivalent; RE: Rutin Equivalent; CE: Catechin Equivalent; TE: Trolox Equivalent; EC: Extinction coefficient.