A wave of advertising has convinced millions of older Americans that pills can sharpen their memory and protect their brains. The reality is far less certain.
About 25% of adults over 50 take brain supplements, but the U.S. Food and Drug Administration does not require these products to prove they work. Supplement makers can make vague claims about brain health as long as they avoid mentioning specific diseases.
The case of Prevagen illustrates the problem. Consumer advocacy group Truth In Advertising has documented a decade of legal battles, including an FTC lawsuit and a jury finding that the company lacked support for its memory-improvement claims. The company is appealing a court order to remove those claims.
Here is the evidence on common brain supplements:
B vitamins are essential for brain function, but unless you are deficient, supplements won't make you sharper. Research remains inconclusive.
Caffeine pills carry overdose risks. Coffee in moderation is a safer bet for alertness.
L-theanine shows promise in small studies, but green tea is a more reliable source.
Omega-3 supplements failed to impress in large NIH-funded studies, though people with the APOE4 gene might benefit from starting early.
Vitamin E? Large studies found no dementia prevention benefit.
Ginkgo biloba? A 3,000-person study found no evidence it prevents cognitive decline.
Ginseng, curcumin, and combination supplements all lack convincing proof of effectiveness.
What does work? The MIND diet, regular physical activity, quality sleep, social connection, and lifelong learning. These habits support brain health without the risks of unproven supplements.