Effect of seasonal changes on the quantity of secondary metabolites from neem and eucalyptus plants in North Central Nigeria

Traditional healthcare system depends majorly on natural medicinal plants from the environment. These produce secondary metabolites which confer them various properties; however, Seasonal fluctuations have impact their availability and quantity hence therapeutic efficacy. This study was carried out to evaluate effect of seasonal changes Neem Eucalyptus plants. Leaves bark SHESTCO, Federal Capital Territory (FCT), Abuja, Nigeria, were collected during four quarters year 2019. Samples dried, milled into powder, estimated antioxidant activity analysed using standard methods protocols. Results this showed a variation in metabolite compositions response seasons. In both plants’ organs, saponin content peaked crashed second fourth respectively, while alkaloid had highest quarter year. Highest level tannin recorded leaf third Antioxidant plant extracts regular patterned decrease with increasing concentration, lowest for organs quarter. Findings indicate that inherent corresponding varies specific manners at different times due variation.