The United States Department of Agriculture (USDA) have made some progress in this regard. They have identified fungi that can remove or inactivate FC's from grapefruit juice and are in the process of finding out how the fungus does that.
It is ironic to note that the fungus used at the USDA is Aspergillus niger. Aspergillus (more usually fumigatus) causes a serious infection known as aspergillosis. The infections are treated with antifungal drugs in an attempt to eradicate the fungus. Once such antifungal is itraconazole and itraconazole is one of those drugs that interact with grapefruit juice, enhancing the effective dose.One species of Aspergillus is helping counteract the pathogenicity of another!