I've never seen an "upper limit" nailed down, although most people never really exceed much over 2g of UA/SU. I will say that considering the nature of UCP-1 as a synergistic stack, the point is to not jam as much UA as possible in your system! I have done 2g daily of SU before for cycles, and still like UCP-1 at recommended dosages, and this did surprise me at first as I'm another person that usually takes huge doses of basically everything, lol. I would try it at recommended doses forst, but be forewarned you may not "feel" much, but that isn't a bad thing. Search around here or more user reports please.