Taking 600 mg of phosphatidylserine (PS) can lower the muscle damaging hormone cortisol by increasing the testosterone to cortisol ratio. The researchers suggest that phosphatidylserine is effective combating exercise-induced stress.
The effects of phosphatidylserine on endocrine response to moderate intensity exercise
Journal of the International Society of Sports Nutrition 2008, 5:11doi:10.1186/1550-2783-5-11
“The findings suggest that PS is an effective supplement for combating exercise-induced stress and preventing the physiological deterioration that can accompany too much exercise. PS supplementation promotes a desired hormonal status for athletes by blunting increases in cortisol levels.”