In order to enhance the medicinal plants of our region and in terms of their impact on health by their profusion substances with antioxidant and radical-scavenging properties, a quantitative comparative study of total phenols and flavonoids, anthocyanidins and flavonoid aglycones as well as scavenger effect the DPPH● seeds of two plants used in breast cancer treatment in Benin was performed. The results, it appears that Garcinia kola is rich in phenolic compounds Cucumeropsis edulis. The ethanol extract of Garcinia kola manifest a higher radical scavenging activity than ethanolic and aqueous extracts. Overall, there is a correlation between anti-radical powers and phenolic contents phytoconstituents (polyphenols, flavonoids, anthocyanins, tannins) extracts of the plants studied.