I take it you are talking about the american GNC site, cos i had a look on the UK site and couldn't find it. Does anyone know a UK site where i can get some?
What "effect" are you referring to? Is it a sedative kinda effect? Or worse, does it kick like pot??
On the other hand I did read that GHB (which has a similar structure to GABA, missing one hydroxyl group) has been found to increase blood pressure....