Has anyone taken phosphatidylserine (for cortisol reduction / better sleep)?

It was. I also listen to this podcast and its pretty good, most of the time. He kind of mentioned it in passing though and the best practice is just to not workout close enough to bed time where it would affect your sleep. The TR podcast has covered this (I don’t remember which episode though) and discussed some natural solutions to prep the body before bed time if you don’t have a choice to workout earlier.