Trib is weird shit. It seems to increase LH in some people, but in doing so it may increase e along with T.
Also, it doesn't work very well in older men and in men with supressed HPTA. That's who need it the most!
The avena, xanthoparmilia, maca, etc combo is the best thing I can think of and lots of guys swear by it. You can buy the ingredients seperately in powder form (and make your own pills) from BAC, or get them all in one capsule from PF or buy them individually from VS, but VS is a little more expensive.