For me, if we talk strictly about themogenic products, I find Yohimflame to be the most effective product. However, if we are talking about fat burning, Cardarine GW and SR9009 are very effective for fat loss purposes - they will promote fat loss, and they will drastically increase your endurance and recovery, helping you with cardio, and leading to even further fat loss. The best thing of all these products is that they do not have any particular side effects to fear.