That's a valid concern, and I agree that it's alarming. We will disclose where we are obtaining the L-Theanine from and provide a Certificate of Analysis.

Also, since this is a double blinded trial, if there are significant differences between placebo and real powders then that affirms that the powder was real.

I kinda wish the FDA had some certification to the effect that "this contains what it says it contains and its contents are no more likely to kill you than a peanut butter and jelly sandwich."

Yeah, that would be nice. There is such thing as a Certificate of Analysis which we are going to try to get from our supplier. http://www.sigmaaldrich.com/united-kingdom/technical-service...

Peanut butter probably isn't the best example...

Why not? It is widely consumed, but there is a portion of the population that has a severe reaction to it.

For day to day things, this is what I consult.

https://labdoor.com/

Good call. consumerlab.com is good too.

In the first link, all of those stores are places I'd never buy supplements from. Many stores sell supplements from brands I never see when I research what to take to fix some problem.

When I realized that, that was the end of ever considering buying supplements from almost all stores.

Whole Foods and similar types of stores are reliable. However, I still prefer researching and buying online. Analyzing comments, both good and bad, are very revealing and can sometimes give you an idea if it will work for you.

But now I just try to eat my veggies and so on. Diversification of food choices gives you a more solid spectrum of nutrients and some foods/nutrients amplify the effects of other nutrients.

The first link is bogus; it turned out to be a failure of testing and they had to abandon all the accusations and settled for nothing: https://www.reddit.com/r/Nootropics/comments/3ice6t/on_suppl...