I'm not going to try it, because after looking at the ingredients - other than the RNA - I get all of that already. And since my probiotic has made such a difference for me, I'm sticking with what works for me. I'm actually looking at ways to cut back on supplements. I recently added a multi that seems to be helping me a great deal, so I've been leaving off the 5-htp. My DH and son are on probiotics too for different reasons, so the supplement bill keeps going up instead of down.
No, I won't be adding anything right now. This looks like what I'm already doing, and I'm still a bit dubious about the RNA factor.