Hi Toro. I don’t know of any good fat burners that don’t cause some type of jitters. You might want to try something with bitter orange extract, but I don’t know how good of a fat burner it is. If an ECA stack gives you the jitters, perhaps you may want to cut the dose in half of what the label recommends. I haven’t tried T2, but you may want to look into that also. CLA might help, but it may take a long time to see the fat go away. With the fat burners that give you the jitters, you have to build some tolerance towards them. In the first few days, you may feel like a tweaker, but if you just hang in there, you may see yourself hooked on these things because the fat burning effects are truly amazing. If you don’t like the side effects these supplements give you, then perhaps it’s better for you not to take them.