Moringa oleifera L. is a miraculous plant due to the presence of essential nutrients, phyto-constituents and natural antioxidants. This study evaluated the aqueous and methanol extracts of M. oleifera leaves for various nutritional parameters, phyto-constituents and antioxidant activities. Results indicated varying contents of mo-isture (78.0±2.2, 7.3±0.7%), ash (0.8±0.1, 1.50±0.8%), fat (0.9 ±0.2, 1.8±0.9%), crude fiber (2.1±0.3, 20.5±1.7%), crude protein (7.1±0.8, 22.7±1.9%) carbohydrates (11.1±1.3, 46.2±2.1%) and energy kcal/100g (81.0±2.5, 292±4.2). Proteins, carbohydrates, hydroxyl-anthraquinone, tannins, alkaloids, saponins, flavonoids, terpenoids and saponins were present in Moringa leaves powder except phyto-sterol and fixed oil. In the methanol extract of Moringa fresh leaves, TPC recor-ded was 76.7±2.5 mg GAE/g and TFC was 24.6±0.40 mg QE/g while in the dried leaves powder, TPC and TFC were 86.2±1.8 mg GAE/g and 29.8±0.4 mg QE/g which were higher than the aqueous extracts. Antioxidant activity of Moringa dried leaves methanol extract with DPPH displayed maximum percentage inhibition (92.5±3.2%) than aqueous extract (65.2±2.5%) and BHT (57.6±2.1%) at 100µg/ml. Same tendency was observed in the reducing power assay for Moringa dried leaves powder methanol extract Conclusively, M. oleifera possess a wealth of nutrients and bioactive compounds with potential antioxidant activity for extraordinary applications in the food and pharmaceutical industries. © 2023, Istanbul Medipol University. All rights reserved.