It's a spectacular failure of the FDA that places like GNC can not only exist but become multi-billion dollar entities peddling BS "supplements" that can promise basically anything as long as they don't claim to be medication. It's another spectacular failure of the FDA- and America's "truth" in advertising laws- that we can be regularly buried with the claims of elderly people who we are told STRAIGHT OUT are accepting money in exchange for BS about a non-drug that "improves brain performance" or whatever.
These people are identified as "Paid Testimonialists" ("testimonialist" is not even recognized as a word by my spellcheck, but whatever- it still sounds better than "shill" or "liar.") They are being handed cash to make claims about a pill which has as its main ingredient jellyfish protein (we all know how jellyfish never forget anything. Ever see a confused jellyfish? Well, there you go.)
My best guess is that Prevagen doesn't cause any harm,* which is the gold standard for anything you can pick up at GNC or the "Holistic Supplement" aisle of your grocery store. What a racket.
*except to your wallet, since "regular strength" costs about a dollar a day and "professional strength" (more jellyfish protein? More Vitamin D?) about three dollars a day. Again, what a racket.