Abstract
A comprehensive analysis of phytochemicals, digestive stability, and bioaccessibility was conducted on a golden barrel cactus extract from 3- and 6-year-old plants. Both ages contained lutein and four chlorophyll derivatives (chlorophyll a, b, pheophytin a, and b), but younger cacti revealed a significantly higher abundance. Total phenolics reached 3545.35 mg gallic acid equivalent/100 g dry weight in the 3-year-old extracts compared to 2557.96 mg/100 g in the older ones. Antioxidant activity, assessed by DPPH, ABTS, and FRAP assays, was consistently higher in the younger group. While digestion impacted all compounds, lutein exhibited relative stability at 69.03% and 58.33% retention for 3- and 6-year-old extracts, respectively. Chlorophylls displayed lower stability (37.64% and 33.34% remaining for younger and older cacti) despite showing higher bioaccessibility (73.385% and 64.65%). Phenolics also demonstrated promising bioaccessibility (76.39% and 69.88%) despite moderate digestive degradation (60.52% and 56.89% retained). Conclusively, all investigated attributes-phytochemical content, digestive stability, and bioaccessibility-favored the younger golden barrel cactus extracts. This highlights the crucial role of plant age in maximizing the potential health benefits of these extracts.
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