José de Sousa Neto¹, Carla Mariana da Silva Medeiros¹, Francisca Maria Macêdo Pereira¹, Jurandy do Nascimento Silva¹, Cicero Alves Lopes Júnior¹

Brazil has vast biodiversity, particularly in the Cerrado and Caatinga biomes. These biomes are home to many plant species with food potential, including unconventional food plants (UFPs). Despite their nutritional and cultural importance, PANCs are understudied and underutilized in the Brazilian population\'s daily diet. Therefore, this study aims to investigate the total phenolic concentration of the following PANCs: yellow guabiraba (Campomanesia xanthocarpa), black guabiraba (Campomanesia aromatica), grão-de-galo (Cordia rufescens), murta (Eugenia brasiliensis), wild passionfruit (Passiflora cincinnata), sighing passion fruit (Passiflora nitida), jatoba (Hymenaea courbaril), murici (Byrsonima crassifolia), pitomba (Talisia esculenta), and croatá (Bromelia antiacontha). To extract the phenolic compounds, 30 mL of anhydrous ethanol was added to 3.0 g of a pulverized, dried sample. The mixture was stirred at 200 rpm for two hours, then centrifuged at 4,000 rpm for ten minutes. The resulting supernatant was collected and analyzed. TPC quantification was performed using the Folin-Ciocalteu method. The obtained analytical curve had the equation Y = 0.00104x + 0.003, with a linear correlation coefficient of r = 0.9995, and detection and quantification limits of 4.87 µg/mL and 16.25 µg/mL, respectively. The TPC results were 1,216.86 ± 4.49; 3,711.03 ± 0.95; 1,573.62 ± 1.85; 1,435.02 ± 3.77; 931.96 ± 3.44; 110.37 ± 2.62; and 1,465. 82 ± 1.09 and 105.03 ± 3.85 mg EAG/100 g for yellow guabiraba, black guabiraba, myrtle, wild passion fruit, passion fruit, jatoba, murici and pitomba respectively. These results are higher than those reported in the literature: 467. 5 mg EAG/100 g for yellow guabiraba (Silva et al., 2025); 854.92 ± 0.95 mg EAG/100 g for wild passionfruit (Ribeiro et al., 2020); and 80.00 mg GAE/100 g (Fraga, 2018). The results reveal the potential of these species, promoting sustainable alternatives to the use of natural resources and improving the nutrition of economically vulnerable populations. The analysis of these PANCs may also foster the development of technologies aimed at utilizing them, as they may have comparable or superior nutritional potential to conventional vegetables. Thus, this work adds value to native Brazilian fruits, contributing to food diversification and nutritional security.

Agradecimentos: Universidade Federal do Piauí, Programa de Pós-graduação em Química, FAPEPI e CAPES