Posted 18 July 2009 - 07:18 PM
Plasma is the clear part of your blood, after the lab "strains" out the red and white cells etc. with a centrifuge. Scientists experimenting with resveratrol and any other supplement or medication want to know how much of it is actually getting into your cells where it can do some good. But with current technology it's not easy to measure that, whereas it's easy to measure how much of the stuff you have in your blood plasma. Same with naturally produced substances that you can have too much of or too little of. So, for example, I just got the amount of homocysteine and cholesterol measured, and the lab report says "homocysteine, plasma" and "cholesterol, serum". ("Blood serum is blood plasma without fibrinogen or the other clotting factors " -- Wikipedia).
So by saying "plasma levels", okok is carefully explaining what's actually been measured in experiments. It's short for "raises the blood plasma level of resveratrol in human test subjects". Hopefully, that means it gets into the cells better and produces more mitochondria and all that, and hopefully that makes you live longer, what what we actually know is that if you draw a test subject's blood and measure resveratrol in the straw-colored part, more of it got that far with buccal administration (swishing around in the mouth).
You're taking a capsule, right? To be absolutely clear, it's the powder inside the capsule, not the whole capsule, that needs to be swished around if it's going to get absorbed right through the mouth ("buccal" delivery). If you start doing it routinely, buying capsules to open them would be a waste of money, so I suggest taking a powder. See the Resveratrol Price Watch topic's spreadsheet.
I can't find the product you're talking about with a web search, but since it's giving you diarrhea I'm guessing it's 50% resveratrol despite the Extra Strength label -- brown powder, not white powder, inside. Maybe that's ok if it's grape seed powder, but I've heard on another topic that 50% resveratrol, 50% knotweed tastes awful. (Knotweed is what they usually use because it starts out with more resveratrol than grapes, so it's easier to concentrate.) No one would even want to choke it down, apparently, let alone swish it around. So I think okok means that you should try buccal delivery with 98% or 99% powder, not open up a capsule that has enough plant impurities to give you diarrhea and swish it in your mouth.