I, too, have recently become interested in this substance; especially since I'm about to come off a cycle and want to modulate stress related responses. First, I have to say that to date I'm aware of only 3 studies which looked specifically at the use of oral PS and modulation of exercise induced cortisol production.
The highest dose used in the studies was 800 mg./day for 10 days. It was indeed associated with a significant reduction in post exercise cortisol levels--~30% I believe. higher doses were associated with greater reductions in cortisol (up to the maximum 800 mg. used ). It should be noted that moderate exercise and exercise lasting less than an hour are associated with only small or insignificant rises in cortisol.
So...I started looking around and found what I think is a good supplement. It's called EndoAmp Max by a company called Primordial Performance. Her's the contents:
Serving size...2200 mg (1 scoop)
Servings per container: 29
Amount Per Serving:
SerinAid* 1600 mg.
phosphatidylserine 800 mg.
phosphatidlcholine 154 mg.
phosphatidylethanolamine 128 mg.
phosphatidylinositol 68 mg.
AlphaSize* (A-GPC) 600 mg.
- SerinAid & AlphaSize are registered trademarks of ChemiNutra Inc.
It runs $52.95 a container which is the best deal I can find. Now's PS runs $19.95 for 60 100 mg. caps, that's $80/month to use 800 mg./day WITHOUT the other phosphatidyl forms or the A-GPC. The best deal I can find on bulk PS still runs .90 gram at 50% purity, which works out to ~ $1.40 per 800 mg. dose, or ~$42/month--again, WITHOUT the additional ingredients.
I will use one (800 mg.) serving each day. On workout days this will be as per my usual Alpha-GPC usage,i.e., 1 1/2 hours prior to workout. At this time I see no evidence that would lead me to use larger dosages. I'll give this a try throughout my PCT and see how it goes. I'll have to reevaluate after that, as this is a pretty expensive supplement and I already have a rather complex and expensive supplement regimen.