I once heard BIB say something to the effect that if taking a pill would increase soft tissues, then all soft tissues in the body would increase at the same time. (i.e. ear lobes, nostrils, penis, etc)
What most of these "penis pills" contain are herbs that increase blood circulation. If you had poor blood circulation, and therefor weak erections, you aren't getting your full length. If that circulation increases and blood flows through the penis better than before you might "regain" that 1/2 inch. You'd be better off on a good cardiovascular health diet and excercise routine.
That being said. I take some of the supplements found in these pills. Ginko biloba is great. I also recommend horny goat weed. And I take desicated liver for the L-Arginine content (amount other things naturally found in liver.) I wouldn't waste my money.
puff