Yeah, so the idea behind epitome is that when we diet, we have some changes that make long-term success more difficult. One of these big metabolic changes involves leptin which regulates appetite and metabolic rate (among other things). I think you probably understand leptin - but for others - the idea is that our fat cells release leptin as they fill, and thus the more we fill fat, the more leptin is released. Leptin, as it gets to our brain, signals our brain to "increase" metabolic processes and turns off hunger/makes us full.
As our fat cells shrink, leptin levels go in reverse and drop. This obviously increases our hunger, but also is an underlying mechanism for the "metabolic slowdown" that supposedly happens with dieting. This leptin drop creates a double-edged sword - our metabolism is slower and we are hungrier. If you have ever been on a severe diet with lots of exercise for a period of time - you may have one day woken up and been ravenous and out-of-control with your cravings for things - that's an extreme effect of leptin dropping.
One way to combat this leptin drop is to have cheat meals - which are great but they have to be infrequent and even if they are infrequent they will set your caloric deficit back a little. Most people accept this because it's 1 step back and 2 steps forward.
If you are very lean (near or below 10% for instance), then leptin will be low because you have so little fat on your body - which also increases hunger and causes a more aggressive response to caloric restriction. I hate to use the term starvation mode but it's the basic idea.
And if you are extremely obese you probably have a lot of leptin floating around but it no longer works - you have become resistant to its effects because it has been elevated so much for so long.
What epitome does is "normalize" leptin levels. So if you are obese and have elevated leptin, it will actually help lower the leptin levels and combat the leptin resistence that is seen.
If you are lean, it will bring up leptin levels even though you have low bodyfat (which is why some people claim it is such a great appetite suppresant)
And if you use it long-term during a diet, it will help to avoid the leptin crashes from dieting, which will allow you to not require as many cheat meals and thus not have to take 1 step back to take 2 steps forward - you can just keep dieting and leptin will stay in range.
So, it's not exactly a "fat burner" per se - it's just part of the arsenal. It's a very different approach than you see in any other product, in my humble opinion.
But for straight appetite suppression, a single stand-alone burner, other products may at least promise more.