## 2 Materials and Methods
### Antioxidant Properties  
The yield of the ethanolic extracts of _C. betacea_ FPF was 6.25. The result of the determination of phenolic compounds of the FPF ethanolic extract of _C. betacea_ was 206.23 mg EAG/100 g dry weight. The antioxidant capacity of the FPF extract of _C. betacea_, by ABTS, showed a concentration of 6.27 umol/Trolox to inhibit 50% of the free radicals. As for the percentage of antioxidant activity of the ethanolic extract of FPF in the DPPH method, the % AA was 91.74 with a concentration of 250.00 ug/m. It showed an IC\({}_{50}\) of 131.26 ug/mL, which is lower than the control (IC\({}_{50}\) of 780.60 ug/mL) as shown in Table 1. Different authors have reported the presence of phenolic compounds in _C. betacea_. [PERSON] et al. [6] reported 223.80 mg/100 g of flavonoids in the pulp. [PERSON] et al. [24] identified phenolic acids in the dried pulp (421.6 mg/100 g), in cultures of _C. betacea_ in New Zealand. In the epidermis (peel) and pulp, they identified polyphenols ranging from 54.67 to 278.03 mg/100 g, mainly phenolic acids. The recommendation for flavonoid intake is between 250 and 400 mg/day, considering the seasonality of food sources [25]. The results of this study agree with those reported by [PERSON] et al. [5], with values of 4.2 to 10.3 umol/Trolox of antioxidant activity, and are higher than those reported by [PERSON] et al. [26] of 1.90 umol/Trolox/g. Therefore, _C. betacea_ showed a free radical inhibition capacity and antioxidant activity due to the presence of natural phytochemicals with antioxidant potential. [PERSON] et al. [27] attributed this antioxidant activity to the presence of flavonoids, polyphenols, and vitamins in the fruit. The values obtained were lower than those reported by [PERSON] et al. [20], with an IC\({}_{50}\) of 800 ug/mL in _C. betacea_ pulp. The difference in the ABTS and DPPH values of the antioxidant compounds present in ethanolic extracts of FPF is due to the type of extractable compounds: hydrophilic and lipophilic [28]. [PERSON] [29] showed that about 50% of the total dietary antioxidants, mainly polyphenols, cross the small intestine bound to dietary fiber, thus resulting in the transport of dietary antioxidants through the gastrointestinal tract, releasing the fiber matrix in the colon by the action of the bacterial microbiota, and producing metabolites and an antioxidant environment. \begin{table}
\begin{tabular}{c c c} \hline \hline
**Parameter 1** & **Pulp** & **Epicarp** \\ \hline Moisture & 86.75 \(\pm\) 0.35 & 68 \(\pm\) 0.00 \\ Fat & 0.18 \(\pm\) 0.01 & 1.71 \(\pm\) 0.17 \\ Ash & 1.1 \(\pm\) 0.02 & 2.1 \(\pm\) 0.04 \\ Protein & 0.00 \(\pm\) 0.00 & 0.00 \(\pm\) 0.00 \\ Crude fiber & 3.57 \(\pm\) 0.09 & 30.12 \(\pm\) 0.17 \\ Total sugars & 61.30 \(\pm\) 0.21 & 20.51 \(\pm\) 0.01 \\ Soluble dietary fiber & 0.12 \(\pm\) 0.00 & 0.14 \(\pm\) 0.01 \\ Insoluble dietary fiber & 3.92 \(\pm\) 0.02 & 8.44 \(\pm\) 0.03 \\ * Total dietary fiber & 4.07 \(\pm\) 0.01 & 8.58 \(\pm\) 0.00 \\ Phenolic compounds 2 & 206.23 \(\pm\) 0.4 & ND \\ Antioxidant capacity 3 & 6.27 \(\pm\) 0.01 & ND \\ Antioxidant activity 4 & 131.26 \(\pm\) 0.00 & ND \\ \hline \hline \end{tabular}  
* All analysis were reported in dry weight. 2 mg of catechol equivalent per 100 g of dry sample. 3 ABTS assay, Trolox equivalent antioxidant capacity (TEAC), umol/ umol Tolox. 4 DPPH assay, IC\({}_{50}\) (umol/ umol of ascorbic acid).  
\end{table} 
Table 1: Bromatological composition of tamarillo pulp and epicarp. *total polyphenol content and antioxidant properties of FPF flour. The presence of polyphenols in _C. betacea_ was reported [25], identifying rosmarinic acid as a compound with important biological, antioxidant, anticancer, and diabetes control properties. These results are similar to those reported by [30], who demonstrated the presence of flavonoids in the red variety of _C. betacea_. Other compounds were identified [7], such as rutin, caffe acid, and chlorogenic acid. According to [PERSON]. [3], _C.