Oh gosh yes, Pepe has expounded at great lengths about the evils of cayenne capsules and I clearly understand the concept.
I have always used them, on the advice of my wonderful naturopath/nutritionist, and have had fantastic results.
Go by the book if you can, but if you cannot bear the cayenne, do not hesitate to try the caps. All I can tell you is from my personal experience they work great.
Best to all you fire breathers,