University of California - Los Angeles Health Sciences Jun 5 2026 Creatine, the organic acid that is popularly taken as a supplement by athletes and bodybuilders, supercharges a critical class of immune cells that activate and prepare the body's key cancer-fighters, according to new UCLA research. The study, conducted in mouse models and human cells and published in  iScience , builds directly on earlier work from the same lab showing that creatine powers killer T cells in their battle against