ABSTRACT

This study investigated the micronutrient composition, amino acid profile, phytochemical constituent and antioxidant properties of oha (pterocarpus mildbraedii) leaves, a traditional vegetable consumed in Nigeria, with a focus on its potential contribution to the diet of children aged 4-6 years. The research analyzed the ami ic acid profile, vitamin content, mineral composition, antioxidant properties, and phytochemical constituents of oha leaf, comparing the results with FAO standards and findings from related studies on similar leafy vegetables. The amino acid analysis revealed that while oha leaf contains essential amino acids, their levels fall below the FAO recommendations for children. Similarly, the vitamin (A, Bl, C) and mineral (calcium, magnesium, potassium) contents were found to be lower than the established standards. However, the leaf demonstrated promising antioxidant properties, with significant DPPH free radical scavenging activity (150.09±0.02) and moderate FRAP (71.40±0.03) and ABTS (40.72±0.04) values, suggesting potential health benefit related to oxidative stress reduction. Phytochemical analysis indicated a relatively high alkaloid content (1.25±0.04), moderate flavonoid levels (0.91±0.03), and lower amour t of phenols (0.08±0.02) and steroids (0.12±0.02). These findings suggest possible medicinal properties but also necessitate caution regarding consumption amounts, particularly for children. However, while oha leaf contributes valuable nutrients an'- bioactive compounds to the diet, it should not be relied upon as a sole source or essential nutrients for growing children. Recommendations include promoting dietary diversification, exploring fortification possibilities, optimizing cultivation and preparation methods, and conducting further research on bioavailability and long-term health effects. These findings and recommendations aim to enhance the nutritional impact of oha leaf in the Nigerian diet and improve overall health outcomes in populations consuming this traditional vegetable.