Table 2: Processing impact on red beetroot compounds and antioxidant capacity.
| Red beetroot variety | Type of processing | Total phenolics | Betalains | Author | ||
| Betacyanins | Betaxanthins | |||||
| Cardeal-F1 | Extraction of beet root pomace | 6.66 ± 0.30b | 1.25 ± 0.03b | 0.74 ± 0.02a,b | 
 Vulic, et al. [68] | |
| Egyptian | 1.87 ± 0.08a | 0.46 ± 0.02a | 0.29 ± 0.01a | |||
| Bicor | 11.98 ± 0.57d | 1.99 ± 0.16c | 1.76 ± 0.04b,c | |||
| Kestrel | 8.23 ± 0.39c | 0.62 ± 0.16a | 0.46 ± 0.01a | |||
| With different maltodextrin ratios: 3:1/4:1/5:1 | 
 
 Microencapsulation of extract | 28.82 mg/100 g | Azeredo, et al. [69] | |||
| 90.71 mg/100 g | ||||||
| 106.09 mg/100 g | ||||||
| 135.98 mg/100 g | ||||||
| Red beetroot | Juice extraction | 1169 mg GAE/L From these Flavonoids- 925 mg catechin equivalent/L pigments- 854 mg/L | Antioxidant activity | Fidelis, et al. [70] | ||
| 325 mg ascorbic acid equivalent/L by DPHH assay | ||||||
| Freeze -drying beetroot chips | 0.75 ± 0.06 GAE mg/g | 95.70% | 
 Vasconcellos, et al. [71] | |||
| Spray drying beetroot powder | 0.51 ± 0.07 GAE mg/g | 95.31% | ||||
| Boiling at 100 oC/40 min | 2.79 ± 0.23 mg/g | 85.79% | ||||
| Juice extraction | 3.67 ± 0.61 mg/g | 80.48% | ||||
| Cereal Bar | 88.13 ± 5.16 mg/60 g | 91.97 ± 0.56% by TAPassay | Santos Baiao et al. [55] | |||
| Drying-chips | 25.58 ± 0.72 mg/60 g | 91.03 ± 2.15% by TAP assay | ||||
| Juice extraction | 10.79 ± 1.89 mg/60 g | 83.98 ± 3.18% by TAP assay | ||||
| Blanching 90 ± 2 °C/7 min | 14.1 ± 1.1 mg gallic acid/100 g FW | 543.6 ± 4.2 mg Fe2+/100 g FW by FRAP assay | Paciulli, et al. [66] | |||
| High pressure processing 650 MPa/3 min | 14.7 ± 2.9 mg gallic acid/100 g FW | 610.9 ± 100.2 mg Fe2+/100 g FW by FRAP assay | ||||
| 650 MPa/7 min | 12.9 ± 1.1 mg gallic acid/100 g FW | 490.9 ± 28.6 mg Fe2+/100 g FW by FRAP assay | ||||
| 650 MPa/15 min | 16.3 ± 4.4 mg gallic acid/100 g FW | 540.3 ± 13.3 mg Fe2+/100 g FW by FRAP assay | ||||
| 650 MPa/30 min | 19.6 ± 3.7 mg gallic acid/100 g FW | 634.3 ± 23.7 mg Fe2+/100 g FW by FRAP assay | ||||
| Red beetroot | Convection drying at 50 °C | 1.95 ± 0.005 mg/ml GAE | 0.348 ± 0.005 mg/g | 0.224 ± 0.0022 mg/g | Nistor, et al. [30] | |
| 60 °C | 1.82 ± 0.0025 mg/ml GAE | 0.424 ± 0.0048 mg/g | 0.31 ± 0.0017 mg/g | |||
| 70 °C | 1.43 ± 0.0015 mg/ml GAE | 0.261 ± 0.0032 mg/g | 0.171 ± 0.0018 mg/g | |||
| 50/40 + MW315e | 2.03 ± 0.0035 mg/ml GAE | 0.509 ± 0.0035 mg/g | 0.616 ± 0.0022 mg/g | |||
| 60/40 + MW 315f | 5.33 ± 0.0045 mg/ml GAE | 0.631 ± 0.0042 mg/g | 0.795 ± 0.0019 mg/g | |||
| 70/40 + MW315g | 3.06 ± 0.0015 mg/ml GAE | 0.655 ± 0.0029 mg/g | 0.601 ± 0.0017 mg/g | |||
amg GAE/g of dry weight of beetroot pomace, bmg betanin equivalents/g of dry weight of beetroot pomace, cmg vulgaxanthin-I equivalents/g of dry weight of beetroot pomace, dRatio V:Y ratio of violet (V) to yellow (Y) pigments, e50/40 + MW315-free convection at 50 ℃/forced convection at 40 ℃ with microwave at 315 W power, ffree convection at 60 ℃/forced convection at 40 ℃ with microwave at 315 W power, gfree convection at 70 ℃/forced convection at 40 ℃ with microwave at 315 W power.