Soy vs. Bovine Phosphatidyl Serine?

[JAGCPT]

Can any of you scientific types tell me about the differences between soy-based and bovine-based phosphatidyl serine and if, in your opinion, these differences are likely to affect its efficacy. If soy-based PS is as good as bovine-based, we might be overlooking a really effective supplement. Before I shell out $30 for some soy-based PS, though, I'd like to know if it's even likely to work.

[Andrew69]

I didnt even know that there was a bovine based PS..so you can forget about a scientific type answer.
I have read of PS reducing cortisol levels with doses of about 800mg per day, but have also read that about 300 mg is the "saturation point" so it should do the trick at that level.
Sorry I couldnt be of more help

[toughnuts]

Soy is bad, no seriously it is.

[JAGCPT]

I didnt even know that there was a bovine based PS..so you can forget about a scientific type answer.
I have read of PS reducing cortisol levels with doses of about 800mg per day, but have also read that about 300 mg is the "saturation point" so it should do the trick at that level.
Sorry I couldnt be of more help

The problem, as I understand it, is that the studies supporting the effectiveness of PS all used bovine-based PS, whereas the supps we are likely to see have soy-based PS. My real question is whether this matters.

[secondsight]

Soy is bad, no seriously it is.

Yeah, I've read a lot of negative articles on soy. Apparently fermented soy products is the way to go.

[PowerSwede]

The problem, as I understand it, is that the studies supporting the effectiveness of PS all used bovine-based PS, whereas the supps we are likely to see have soy-based PS. My real question is whether this matters.

Not in any way.

[size]

it is older thread from 2003 but it is still relevant. Enjoy:
http://forum.bodybuilding.com/showthread.php?t=186041

[JAGCPT]

Great thread, but it still isn't clear to me whether any of the studies showing PS working involved soy based PS. Chemically, is there any difference between the two that might affect how they work?

[JAGCPT]

I did my own google search and came across this study indicating that soy-based PS reduced cortisol. Then again, I saw elsewhere speculation that soy-based PS wouldn't be as good because it did not have DHA like bovine-based PS. Anyone else have any thoughts on this? Based on this study below, I'm thinking it might be worth my $30 to give it a shot.

http://taylorandfrancis.metapress.co...lts,1:105347,1

[size]

PS is hard to find alot of good info on. When I have used it, I definitely felt it was worth the cost.

[Addicted2Mass]

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