No, the results are always the same and they never diminish. You will get the same effects in the body from week one till week 200000000000 . With anything it gets harder and harder to get more results when you get into further into it. Not because the effects of it are going away, but because that is just the way it is.
Its easy as hell for some one 50lb overweight to lost that first 20-30lb and then the last 20 is harder. It is a lot more easy to lose the last 20lb then it is to squeeze out that last 5lb or so. Getting down to 10% can be fast. Getting down to &% hard, getting down to 5% super hard. Of course the more advanced you get the harder it gets to reach the next level.
No matter what the product is always working just as good forever.