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Phenolic, Flavonoid, and Antioxidant Profiles of Sago (Metroxylon sagu Rottb.) Leaf Ethanol Extract Muhammad Isrul; Bai Athur Ridwan; Ahmad Syaiful; Azlimin Azlimin; Tenri Zulfa Ayu Dwi Putri; Eviyanti Jambilu; Mahfuzun Bone; Vina Maulidya
Borneo Journal of Pharmacy Vol. 8 No. 4 (2025): Borneo Journal of Pharmacy
Publisher : Institute for Research and Community Services Universitas Muhammadiyah Palangkaraya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33084/bjop.v8i4.7818

Abstract

Oxidative stress drives many degenerative conditions, motivating the search for safe, plant-based antioxidants. Sago (Metroxylon sagu Rottb.) leaf is comparatively underexplored. This study evaluated its antioxidant activity and related it to phenolic and flavonoid contents. A 96% ethanolic leaf extract was assayed for radical-scavenging activity by DPPH using ascorbic acid as the positive control; IC50 values were obtained from linear regression of % inhibition versus concentration (2.5–10 ppm). Composition was profiled by total phenolic content (TPC; Folin–Ciocalteu, expressed as mg gallic acid equivalents per g, mg GAE/g) and total flavonoid content (TFC; AlCl3 colorimetry, expressed as mg quercetin equivalents per g, mg QE/g). The extract showed very strong DPPH activity (IC50 = 11.873 ± 0.025 µg/mL), while ascorbic acid yielded 3.166 ± 0.025 µg/mL; both fall within the <50 µg/mL category. The extract contained TPC = 1.61% w/w (~16.1 mg GAE/g) and TFC = 3.05% w/w (reported on the quercetin-equivalent scale). These indices are consistent with the low IC50 and support a phenolic-driven antioxidant profile. Metroxylon sagu leaf extract exhibits very strong radical-scavenging activity, supported by appreciable levels of phenolics and flavonoids, which identify M. sagu leaves as a promising natural antioxidant source. The findings provide a concise quantitative basis for follow-up work focused on targeted phenolic/flavonoid profiling, as well as broader antioxidant evaluations.
Co-Authors Abdurrahman, Syawal Ahmad Syaiful Ahmar, Sadli Bill Alani, Fitriani W Andriani, Rina Ardiansyah, Ririn Teguh Asbath Said Asbath Said Awaliyah, Nur Hatidjah Azlimin, Azlimin Bachmid, Sitti Nursaliima Baco, Juliana Chairun Wiedyaningsih Chicha Fatahena Citra Dewi Citra Dewi Djunaiddin Djunaiddin Dwi Syah Fitra Ramadhan Eviyanti Jambilu Firmansyah Fitri Handayani Fitri Yanti Fitri Yanti Fitriah, Wa Ode Ida Hanafi, La Ode Ali Hasanuddin, Silviana Hatidjah Awaliyah Halid, Nur Himaniarwati, Himaniarwati Husniati Husniati Husni Ida Fitriah, Wa Ode Ifaya, Mus Ilyas Yusuf, Muhammad Islaeli Islaeli Islaeli Isrul, Muh. Juslan Khatifah, Ulmiah La Ode Ali Hanafi La Ode Hamiru La Ode Saafi Laode Ali Hanafi Laugi, Putri Salsabila Lestari, Sari Arie Lolok, Nikeherpianti Mahfusun Bone Mahfuzun Bone Marningsih, Elfi Masriwati, Sitti Muhammad Afdal Nur Muhammad Isrul Muhammad Isrul Mus Ifaya Nike Herpianti Lolok Nirwana Nur Afriyaningsih Pasaeno Nurdian Salam Nurhady Nurlinda Nurlinda Pusmarani, Jastria Rachmah, Iin Mawaddah Rahmaniar Trisnaputri, Dian Rasyid, Sri Anggarini Rifa’atul Mahmudah Rina Andriani Ririn Teguh Ardiansyah Risky Juliansyah Putri Rismayanti Fauziah Sadli bill Ahmar Salam, Nurdian Samsibar Saranani, Selpirahmawati Sari Arie Lestari Siharis, Fatma Sari Silviana Hasanuddin Silviana Hasanuddin Siti Wulandari Sitti Nursaliima Bachmid Suriana Susi Ari Kristina Susi Ari Kristina Syafrie, Firhani Anggriani Syamsiah Pawannei Tasman Tasman Tasnim Tasnim Tenri Zulfa Ayu Dwi Putri Ulva, Sitti Marya Utami, Apriliani Putri Uyun Wardarini Vina Maulidya Wa Ode Rahmadania Wa Ode Rahmadaniah Wa Ode Yuliastri Wanda Salsyafirah Waode Pusmarani Warnila Yasmin, Laode Muhamad Yuliastri, Wa Ode Yuliatika, Kristiana Yulli Fety Yusuf Useng Yusuf Useng