The search for alternative sources of medicines includes a test for the phytochemical composition. This study aimed to determine the qualitative and quantitative flavonoid and steroid composition of twelve selected Malaueg medicinal plants generally. Specifically, it aimed to determine the leaves of the medicinal plants if it contains the composition of flavonoids and steroids. The presence of flavonoids may indicate its protective effects against many infectious (bacterial and viral diseases) and degenerative diseases such as cardiovascular diseases, cancers, and other age-related diseases. Its presence indicates antioxidative, anti-inflammatory, anti-mutagenic and anti-carcinogenic properties, free radical scavenging capacity, hepatoprotective, capacity to modulate key cellular enzyme functions, and possible inhibition of several enzymes, such as xanthine oxidase (XO), cyclo-oxygenase (COX), lipoxygenase and phosphoinositide 3-kinase. The presence of steroids points to the following potentials of plant steroids: medicinal, pharmaceutical and agrochemical activities like anti-tumor, immunosuppressive, hepatoprotective, antibacterial, plant growth hormone regulator, sex hormone, anti-helminthic, cytotoxic and cardiotonic activity. This study highlights the amount and presence of flavonoids and steroids of 12 medicinal plants. It is recommended that the aqueous extract be studied for the flavonoid presence. It is further recommended that other solvents be utilized in the extraction process.