Medicinal plant based herbal product have been used in the history for the treatment of numerous Human disorders. Plant based commercial products were used in the society for different purpose from the health supplement to medicament. In the ancient time maximum health based products were prepared from natural source and plants were the most one. Plants contain rich source of phytochemical called secondary metabolite and flavonoidal compound are one of the best examples and most applicable among all the known phytochemicals. Plants, vegetables, flowers, fruits, coffee, cocoa, tea and red wine are the best source of flavonoidal compound. Flavonoidal class phytochemical is having vasodilatory, antiischemic, antiinflammatory, antiviral, anticancer, antibacterial and antioxidant activities. Present review collected and summarized all needed information of flavonoidal class chemical including karanjin. Medicinal importance, biological sources and pharmacological activity of karanjin have been collected and presented in this review article. Databases analysis revealed the presences of karanjin plants such as Fordia cauliflora, Lonchocarpus latifolius, Millettia pinnata, Millettia pubinervis, Pongamia pinnata, and Tephrosia purpurea. Collected scientific information have been analyzed for their pharmacological activities and revealed the importance of karanjin against various form of disorders such as cancer, glucose metabolism abnormalities, brain related disorders, gastrointestinal disorders, arthritis, colitis and psoriasis. However analytical techniques database analysis revealed the importance of RP-HPLC, TLC, HPTLC, UPLC-ESI-MS/MS and HSCCC in the estimation of karanjin in various plants and their derived products. Scientific information of this review paper is collected from various scientific databases such as google, pubmed, and science direct etc. Presented information will be helpful for the development of better medicine from karanjin against numerous human disorders.