Dementia: Ginkgo, Sage, Memory Claims & Evidence

Memory supplements are easy to market and hard to prove. Dementia is where the difference between “brain health” advertising and actual clinical evidence becomes especially important.

Quick answer

NCCIH reports that ginkgo has not been shown to prevent dementia or slow cognitive decline. Some studies suggest modest symptom effects with certain standardized extracts, but the findings are inconsistent. Sage has only very limited human research in Alzheimer’s disease.

Ginkgo

A large trial of more than 3,000 older adults found that a standardized ginkgo extract did not reduce the incidence of dementia or Alzheimer’s disease and did not slow cognitive decline.

Sage

Small studies suggest sage may affect some cognitive test scores in healthy people, but NCCIH says it is uncertain whether sage affects cognition in people with Alzheimer’s disease.

Evidence strength

Norene’s Farmacy rating: NO CONCLUSIVE PREVENTION OR DISEASE-MODIFYING EVIDENCE for ginkgo; VERY LIMITED HUMAN EVIDENCE for sage in Alzheimer’s disease.

Safety

Ginkgo can increase bleeding risk and interact with medications. Some sage species contain thujone, which can be toxic in high doses or with prolonged use.

Sources

National Center for Complementary and Integrative Health. Dietary Supplements and Cognitive Function, Dementia, and Alzheimer’s Disease; Ginkgo; Sage.

Dr. Village Reports is educational information and product guidance, not medical advice.