I don't have the yellow clomid mine are blue and I just tasted one to test and they do taste like crap but, then again the clen also taste like crap also. All I can say is to take a half of a tab of the yellow and wait about an hour or so and if you start getting the shakes really bad then that is probably the clen. If you don't get the shakes try the same with the white tabs just to make sure that you do get the shakes with the white ones or vise versa. Just to be on the safe side, I would hate to be you if you took 6 superclen by accident who knows what would happen to you. They are both faily soft tabs, when I split them with a razor blade it just goes right through, as with my winny or var they are alot tougher. Either way GOOD LUCK