What I heard is that the sprouts can contain high concentrations of nasty stuff, I'd always assumed that those were created during the sprouting, that might be something different as well, should probably check. But I think the consensus is that if you fry sprouts just the right amount (to denature the toxins but not the other nutrients) they're a lot healthier than cooked beans, otherwise they may contain toxins (or not many nutrients at all). It was never a gamble I felt comfortable making, so I sort of abstained from them.