The only one I have tried is Cutler King. Ran 2 bottles and even though it is cheap, I just did not have any tangible benefits. However, this does seem to be one of the least recommended PA products.
The original King was a great product. It used Mediator PA, which is high quality, standardized for 50% PA, so you were definitely getting your 750mg/day PA from it, and it was priced well for a concentrated PA supplement. Then, for whatever reason, they switched out Mediator for "Activator," and the new formula as 1g total between this and Niagin, which I think they said was dosed around 200mg or so, leaving less than 1g for sure for the Activator. Now, there is really no information available on this "Activator," despite the TM after the name, and also no information on who owns the TM, or what it's standardized for at all. Now, I recall something about it being more cost effective, but considering that Mediator 50% is pretty much the gold standard for concentrated PA, it seems highly unlikely that this Activator is more highly concentrated than Mediator, and that they would be so quiet about the standardization and not answer any questions about the PA content. It seems likely, based on basic math and knowledge of PA supplements, that it doesn't have 750mg/day PA like the studies used and the old King had. Hope that helps. There was a big "debate" over this switch to Activator over on another forum a while back, and no real answers were given on what it really is.
