Similar to blueberries, grapefruits contains antioxidants. However rather, than anthocyanins, they contain naringenin and naringin. When paired together, naringenin and naringin are excellent for inflammation reduction which means that you are at a much less risk of developing hepatic fibrosis which is chronic inflammation which chocks up the liver. The other antioxidants contained also contribute in the reduction of the risk of swelling.
Putting in grapefruit in your alcohol ensuires the presence of naringin which helps the liver reduce the negative effects of alcohol as well as metabolize the alcohol. It will likely reduce the length of your alcohol.