Okay, so now I'm disappointed.
I subscribed to Consumer Labs, and although it seems worthy for someone who may be interested in testing results of a wide array of products, I didn't find much at all helpful for most of the products identified on this site. Examples:
Korean (Panax Red) Ginseng: On this one, they have great info. Good deal.
Arginine: Okay, pretty much every brand was approved. Good.
Pycnogenol: Nothing at all.
Maca: Beside a mention here or there--and inclusion in a combination product--there are no tests on any brands of this one.
Horny Goat Weed: They do not approve any brand they tested. They do however approve a few products that contain HGW in combination with other things you may or may not want. I see no testing on any concentrated extracts of icariin--which is spotlighted in your e-book.
Gotu Kola: Nothing at all.
Tongkat Ali: Nothing but a brief mention.
Oh well. The Peak Testosterone site has been of tremendous help and encouragement to me. And I like the idea of the Consumer Labs site--but I don't find it helped me much in identifying specific brands for most of the products I want to make a part of my diet.
Any other ideas?