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Total Phenolic and Flavonoid Content and Evaluation of Antioxidant Activity of Roselle (Hibiscus sabdariffa), Lemongrass (Cymbopogon citratus), and Ginger (Zingiber Officinale) Combination Extract Based on FRAP Methods. JFM 2026, 9 (1), 293-298. https://doi.org/10.35451/jfm.v9i1.3914.