Mine have been doing that for so long now, it's expected
....
Reduce and LeanXtreme have such an incredible track record, I'd go with these. Also, you don't want to lower cortisol TOO MUCH as there are in fact deleterious sides that come from LOW cortisol levels. An anaology would be using your favorite stim; one that packs the perfect punch. Why go out and buy the newer "greater" stim when that might make you too wired, too amped up, make your heart jump outta your skin,etc. The "extra" stim is not "all good".
That said, I'll stand by and let coop and ther other smarties attack this question directly.