July 2026 in “Journal of Medicinal Plants Studies” In this study, methanolic extracts of Hibiscus rosa-sinensis showed higher phenolic and flavonoid content, as well as greater concentrations of gallic acid and quercetin, than aqueous extracts, despite the latter yielding more extract, highlighting the effectiveness of methanol for extracting bioactive phytochemicals.
September 2026 in “Journal of Pharmacognosy and Phytochemistry” This review summarizes existing evidence on key phytochemicals from Hibiscus rosa-sinensis flowers and calls for more clinical trials to support their potential in nutraceutical and pharmaceutical development.
13 citations
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October 2012 in “Free Radicals and Antioxidants” This study found that red-flowered cultivars of Hibiscus rosa-sinensis displayed the highest antioxidant activity, phenolic, and flavonoid content compared to other colored cultivars.
May 2023 in “Endocrine, metabolic & immune disorders” This review describes the diverse pharmacological and phytochemical properties of Hibiscus rosa-sinensis, noting its wide range of traditional medicinal uses and safety at higher extract doses.
4 citations
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October 2017 in “Indian drugs” This study isolated and characterized several chemical compounds from the leaves and flowers of Hibiscus rosa-sinensis, using spectral data and chemical reactions for structure elucidation.