My experience with the fat burning side effects of HGH is that after about 3 months of taking it, I lost some body fat, but didn't really lose weight from the HGH itself. My lean muscle got better and the appearance of being more cut is already apparent although it also is helpful in fat burning. Having said that, I really got way more hungry and ate myself silly. So bottom line is that I didn't lose any fat. Oh, the tangle web we weave trying to have it all! Stay tuned for some more product information on all the different HGH product information along with sources for the different options out there. Sytropin is what I've been taking to get fat burning results I mentioned above.