Clitoria ternatea is rich in a wide range of phytochemicals that contribute to its medicinal properties. These compounds play a key role in the plant’s biological activities, it is contained tannins, phlobatannin, carbohydrates, saponins, triterpenoids, phenols, flavanoids, flavonol glycosides, proteins, alkaloids, antharaquinone, anthocyanins, cardiac glycosides, Stigmast-4-ene-3,6-dione, volatile oils and steroids. Traditional medicine systems have used this plant to treat a variety of ailments such as indigestion, constipation, arthritis, skin diseases, liver and intestinal problems. The flowers of C. ternatea are used worldwide as ornamental flowers and traditionally used as a food colorant. C. ternatea flower extracts were found to possess antimicrobial, antioxidant, anti-inflammatory, cytotoxic and antidiabetic activities which are beneficial to human health. This review will highlight the environmental, chemical constituents and pharmacological effects of Clitoria ternatea.