This study was conducted to determine the chemical composition and photochemical of Oha leaves (P. soyauxii). Fresh leaves of P. soyauxii were destalked, washed and oven dried at 100oc. The dried P. soyauxii leaves were ground into fine powder using pestle and mortar and evaluated for chemical, mineral and photochemical using standard methods. The chemical composition showed P. soyauxii contain, moisture 79.63%, Ash 8.87% fat 6.69%, protein 2.37% , fiber. 66% and carbohydrate 8.47% the mineral showed that P. soyauxii contain 86.00/100g, potassium 8.60mg/100, magnesium 1.30mg/100g, iron 7.60mg/100, zinc 3.40mg/100g, sodium 2.60mg/100g, copper 3.30mg/100. The presence of pytochemical in P. soyauxii such as saponins 0.89%, oxapate 2.74mg/100g and flavouoid 12:69%. This study revealed that P. soyauxii if consumed insufficient amount, would contrinte greatly to the nutritional status of human health and to the food security of Nigerian population. Keywords: Oha (P. soyauxii), phytochemical, oxalate, flavonoid, phytate, saponins.

Average number of secondary cases arising from an average primary case in a population over the course of its infectious period is reproductive no. if whole population is susceptible (infection is novel like nCOVID-19) then it is called as basic reproductive no. The herd immunity threshold is the proportion of a population that need to be immune in order for an infectious disease to become stable in that community. To eliminate any disease the effective reproductive no. is to be <1.

Cancer chemoprevention is defined as the application of natural or synthetic agents to suppress or reverse cancer development and progression. In this field especially diet derived compounds have recently attracted researchers’ attention as potential therapeutics generally exerting low toxicity compared with regular drugs. This review presents a survey of recent findings concerning the most promising dietary chemopreventive agents such as green tea polyphenols (i.e. catechins), long-chain polyunsaturated fatty acids, carotenoids, glucosinolates/isothiocyanates, vitamins (i.e. vitamin D and folate) and minerals (i.e. calcium and selenium). Molecular targets involved in intrinsic pathways affected by these natural compounds are also shortly discussed.