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Expand chart
Note: Some totals don't add to 100% due to rounding; Data: SurveyMonkey poll of 2,360 U.S. adults conducted May 5-8, 2019 with a margin of error of ±3 percentage points. Poll methodology; Chart: Axios Visuals

Memory supplements claiming to ward off cognitive decline abound but there is so far little evidence they're effective.

The big picture: The business of memory supplements — from branded regimens to vitamins — pulled in $3.2 billion globally in 2016.

"People are willing to pay and do anything to preserve their brains ... but we don’t have the knowledge yet to give really effective interventions that change that trajectory as much as people think."
— Joanna Hellmuth, neurologist, University of California, San Francisco

"The problem is that a lot of the interventions being marketed directly to consumers don’t do rigorous studies of the outcomes," says Hellmuth, who recently wrote about the "rise of pseudomedicine" for brain health.

  • There are also questions about the safety of supplements, the Wall Street Journal reports.
  • The Food and Drug Administration recently cited 17 companies for illegally selling products "that claim to prevent, treat or cure Alzheimer’s disease and a number of other serious diseases and health conditions."

Go deeper:

Go deeper

Biden: There won't be "American forces moving into Ukraine"

President Joe Biden told reporters Tuesday that he does not foresee U.S. troops moving into Ukraine.

Why it matters: Biden's comments come as tensions between Russia and Ukraine persist, and a Russian invasion of Ukraine appears increasingly likely.

Updated 3 hours ago - Politics & Policy

Omicron dashboard

Illustration: Shoshana Gordon/Axios

  1. Health: Axios-Ipsos poll: Omicron's big numbersAnother wave of death — FDA limits use of Regeneron and Lilly antibody treatments — Fauci: "Confident" Omicron cases will peak in February.
  2. Vaccines: Pfizer begins clinical trial for Omicron-specific vaccine — The shifting definition of fully vaccinated.
  3. Politics: Biden admin withdraws temporary vaccine-or-test mandate for large employers — New York Supreme Court strikes down Gov. Hochul's mask mandate for public areas — Sarah Palin tests positive, delaying defamation trial — Virginia school boards sue Gov. Youngkin for lifting mask mandate.
  4. World: U.K. to lift travel testing requirement for fully vaccinated — Beijing Olympic Committee lowers testing threshold ahead of Games.
  5. Variant tracker

The Robinhood M&A rumor mill churns

Illustration: Sarah Grillo/Axios

Robinhood's valuation is now just over $11 billion, a fraction of where it traded in August and below that of its last private round of funding. Cue the M&A mongers.

Why it matters: It's not just Robinhood—falling values of growth-oriented tech stocks have raised speculation that formerly high-flying fintechs could be snapped up by more well-capitalized buyers.

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