Champion Nutrition Cortistat PS is designed to prevent excess cortisol secretion while helping to keep your joints and muscles from getting too sore. The active ingredient, phosphatidylserine, has been shown in laboratory studies to significantly blunt the body's secretion of cortisol in response to intense exercise. Another double-blind study (both test athletes and control athletes not aware of whether they got phosphatidylserine or a placebo [nothing]) found that test athletes given phosphatidylserine recovered faster, got stronger, and stayed healthier than athletes in control groups who were given placebos. If you are serious about your sport and maintaining your progress, discover how much better you can be when you keep your cortisol levels under control.