Does Prevagen Actually Work? What a Jury Found About Its 8 Memory Claims (2026)

By Shannon Nicole, Founder, Switch to America · September 30, 2026
Published September 30, 2026 · Last updated September 30, 2026

What did the company promise you?

Quick answer: your memory back, "clinically shown," from a protein first found in a jellyfish.

Quincy Bioscience makes Prevagen. New York's attorney general says Quincy put memory claims on the box from at least 2011. National TV and radio ads followed in 2013, the state says.

One TV ad asked, "Can a protein originally found in the jellyfish improve your memory?" Then it answered itself. "Our scientists say yes."

By the state's count, a 30-day supply can cost up to $89.95.

The attorney general said Quincy "took advantage of the very real fear of cognitive decline." That fear is real. The state says it is what Quincy sold to.

What is actually in Prevagen?

Quick answer: a jellyfish protein, and the state says Quincy's own papers doubted it ever reaches your brain.

Apoaequorin, the jellyfish protein

The box is sold on a protein called apoaequorin, first found in a jellyfish that glows. Newer boxes add vitamin D.

The pitch was simple. Swallow the protein and it replaces what your brain loses with age.

But protein gets digested. The FTC alleged Quincy's own safety tests found it is "rapidly digested in the stomach."

At trial, the state says, Quincy's own papers admitted it is quickly digested and unlikely to reach the brain.

So the pill promised to feed your brain. By the state's account, Quincy's own files said it likely never gets there.

What did the jury find?

Quick answer: none of the eight claims had reliable science behind them. That includes "clinically shown to improve memory."

The FTC and New York sued Quincy in January 2017. The FTC said Quincy leaned on one study it ran itself.

The FTC alleged that study beat a dummy pill on none of nine memory and thinking tests. Then, it alleged, the results were sliced more than 30 other ways. Most still showed nothing, the complaint says.

In 2024 the case went to a two-week trial in Manhattan. And so a jury got to weigh all of it.

The jury found none of the eight claims was backed by "competent and reliable scientific evidence." On November 18, 2024, Judge Louis L. Stanton ordered Quincy to "immediately remove" all eight.

Weeks later he spelled out that the ban runs nationwide. He wrote that Quincy kept using the claims after trial. To him, that was "a near assurance" Quincy would do it again.

So the words that sold you that box? A federal judge ordered them off it.

Here is what you paid for, side by side with what the record shows.

What you were told	What the record shows	Named authority and date	What it does NOT mean
"Clinically shown to improve memory"	Not backed by competent and reliable science	Federal jury, Manhattan, 2024	Not a finding that Prevagen is unsafe
"Improves memory within 90 days"	Its own study beat a dummy pill on none of nine tests, the FTC alleged	FTC complaint, January 2017	An allegation, not the jury's finding
The protein reaches your brain	"Quickly digested and unlikely to reach the brain," per the state	New York Attorney General, May 2024	The state's account of trial papers, not the jury's verdict
Eight memory claims on the box	All eight ordered off, nationwide	Judge Louis L. Stanton, November and December 2024	Not a ban on selling Prevagen

What if it helps me anyway?

Quick answer: you may feel it does. The judge saw no evidence of harm, but no reliable science showed it works.

The case was not a clean sweep. Here is the other side, straight.

One. The jury found only two of the eight claims "materially misleading." That means misleading on a point that matters to a buyer. Both were about memory problems that come with age.

Two. The judge wrote there was "no evidence that Prevagen, or the challenged statements, had actually caused harm." He also turned down New York's demand for money.

Three. The court did not ban Prevagen, and it is still sold. Quincy appealed, and three appeals judges heard the case on February 26, 2026.

So why does it still sit wrong with me? Because "no harm" is not the same as "it works." You paid for memory. Nobody could show you the science for it.

And I will say the hard part out loud. Nothing I tell you below is a memory fix, and I am not going to promise you one.

What do I do instead?

Quick answer: stop buying the box. Put that money into real food from a farm you can visit.

If there is a box in your cabinet, no shame in that. It sat on the pharmacy shelf with "clinically shown" printed on it. You had every reason to trust it.

Now you know what the jury found. So stop buying it. Put the box in the trash tonight and be done with it.

Then spend that money on food you can trace. Find a local farm near you this week and get to know the farmer. Ask how the hens are raised and what the cattle eat.

That money goes to a person now, one you can look in the eye.

And tell one friend what you found. She may have the same box, or her mother does.

What else do people ask?

Is Prevagen safe to take?

The case was not about safety. The judge wrote there was no evidence Prevagen had caused harm. The jury found that none of its eight memory claims had reliable science behind them.

Is Prevagen still sold in stores?

Yes. The court did not ban it. It ordered the eight memory claims off every box and ad. Quincy has appealed.

Did Quincy have to pay a fine?

No. The judge turned down New York's demand for penalties. He found no proof of damages. What Quincy lost was the words that sold the box.

Was I foolish to buy it?

No. You bought a box that said "clinically shown" from a store you trusted. A jury later found that claim had no reliable science behind it. The mistake was the company's, not yours.

Who do you become?

It is a Tuesday afternoon. The sun is on your counter and there is flour up to your wrists. You are laughing, head back, at nothing much.

The box is gone from the cabinet. The money it cost goes to a farmer you know by name.

You still walk into a room and forget why, now and then. You laugh at that too, because nobody is selling you the fear anymore.

You are the one who asks who is behind a promise before you pay for it. That took one evening.