From my experiences, as I've tried Caber (liquid and pills), Dostinex (liquid and pills) and Pram (liquid); caber and dostinex PILLS ONLY were the ONLY effective ones for me and man o man were they effective!!!! LOLOL. Make you a very very sick bastard in terms of horniness. LOL
I recall reading some Brologic somewhere that said these compunds are rendered inert when added to solutions UNLIKE all the other popular research products. I tend to agree based only on anecdotal information.