Hey Rick, did a little research and came across this info from a Muscletech brand. There are several brands.
High Potency PhosphatidylSerine. Reduces Cortisol to Support Muscle Recovery. Improves Testosterone to Cortisol Ratio. 150mg Phosphatidyl Serine. Platinum Phosphatidylserine is a powerful phosphatidylserine supplement that delivers a daily clinically studied 600mg dose of phosphatidylserine. This precise dose was shown in a 10-day clinical study to help subjects suppress cortisol levels by 39% more than when they used a placebo. It also significantly improved subjects' testosterone to cortisol ratio, which can help combat exercise-induced stress for improved recovery post-workout. Researchers believe phosphatidylserine could increase the rate of glucose transported into muscle cells and, therefore, enhance recovery of muscle glycogen following strenuous exercise. What's more, Platinum Phosphatidylserine is completely free of stimulants, and is an excellent addition to your musclebuilding stack.