Our doctor told us early on, there is NO supplement, pill, snake oil, etc... that can change this disease. He did say, staying active, eating healthy and participating in life can sometimes slow it down, but told us not to believe anything you see on tv. I know some might disagree and if it works for you or your loved one that's great, but personally I do not believe it works.

Well, I can't comment on EVERY ad that's on TV, but here's what Harvard Health Publishing (Harvard Medical School) says about Prevagen:

"The US Federal Trade Commission wasn't convinced of the supplement's benefits. It charged the supplement maker with false advertising back in 2012. In the legal filings, the company was accused of selectively reporting data and misleading the public though claims that Prevagen is "clinically proven" to improve cognitive function. The lawsuit has not yet been decided."
and
"...commercials suggesting that a supplement can reverse or slow Alzheimer's disease, or any dementia, are perilously close to running afoul of the rules on marketing supplements. The makers of Prevagen have been warned before about making deceptive claims by the Federal Trade Commission and New York state's attorney general in 2017)."

You can read it here:
https://www.health.harvard.edu/blog/fda-curbs-u...(Phone number can only be seen by the question and answer creators)

The short answer is YES. Prevagen is awful and is constantly being sued by users and the FTC. The medical claims are not only unproven, but biologically impossible - they claim that the main ingredient crosses the blood-brain barrier in the form of amino acids to restore lost proteins, but amino acids can’t cross the blood-brain barrier. They run so many commercials to make money to pay off their lawsuit settlements.

Steve, here’s a link to a review of brain supplements. Prevegen is tanked lastin a list of five supplements.

https://www.reviewscout.org/top-5-nootropics/?u...(Phone number can only be seen by the question and answer creators)&hsa_cam(Phone number can only be seen by the question and answer creators)&hsa_grp(Phone number can only be seen by the question and answer creators)&hsa_ad(Phone number can only be seen by the question and answer creators)&hsa_src=g&hsa_tgt=kwd-(Phone number can only be seen by the question and answer creators)&hsa_kw=vitamins%20for%20mental%20focus&hsa_mt=b&hsa_net=adwords&hsa_ver=3&gclid=CjwKCAjw3oqoBhAjEiwA_UaLthUU5NP_1avhKBz01W2Ci6O3rixL0DnAAdwYC2CI3MFHQiWUmD5TMBoC4-sQAvD_BwE

https://www.wired.com/story/prevagen-made-milli...
See also:
Search for: Is Prevagen safe to take for your brain?
Why is Prevagen being sued?
Prevagen | Center for Science in the Public Interest Prevagen
In an extensive nationwide advertising campaign, the makers of Prevagen claim that the supplement is “clinically shown to improve memory.” But, the FTC and New York allege that the company's own study found that Prevagen was no more effective than a placebo at improving memory.Oct 8, 2021
Prevagen - Center for Science in the Public Interest

(by Googling)