Evaluation of Antioxidant Properties and Nutritional Compo-sition of Portulaca Grown in the Arid Region of Kyzylorda, Republic of Kazakhstan

This study evaluates the antioxidant properties and nutritional composition of Portulaca oleracea grown in the arid region of Kyzylorda, Republic of Kazakhstan, highlighting its potential as a natural antioxidant source. The antioxidant capacity of Portulaca was assessed using the Ferric Reducing Antioxidant Power (FRAP) assay, yielding values of 43.5 ± 1.0 mg GAE/g dry weight, and DPPH radical scavenging activity, with a value of 83.77% at a concentration of 200 mcg/ml. Total phenolic content (TPC) and total flavonoid content (TFC) were recorded at 16.88 ± 0.39 mg GAE/g and 26.33 ± 0.97 mg rutin/g, respectively. Additionally, Portulaca showed a significant omega-3 fatty acid content, with linolenic acid (C18:3) measured at 26.7 ± 2.1%. The plant is also abundant in essential vitamins and minerals, including vitamin C (20.06 ± 4.61 mg/100g), calcium (7656.16 ± 2663.69 mg/100g), and iron (5309.65 ± 1056.76 mg/100g). These findings support the suitability of Portulaca as a natural alternative to synthetic antioxidants in the food industry, suggesting its potential application in the development of functional foods and promoting further research into its diverse benefits.