$39 million per gallon cost for scorpion venom. It is the most expensive liquid in the world. Scorpion venom has a wide array of medical applications, from identifying tumors to treating malaria, antibacterial, antifungal, antiviral, antiparasitic, Immunosuppressive, analgesic, anticancer and bradykinin potentiating
Reference : National Library of Medicine read more : https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7277529/