The average age of the patients was 64. Half of them were given 450mg of ginkgo biloba daily, in addition to 100mg of aspirin, while the remainder were given only the aspirin. All the participants took a neuropsychological test (Montreal Cognitive Assessment) at the start of the trial, and then 12, 30, 90 and 180 days later, to check for any cognitive impairment.
Adding the Ginkgo biloba supplement was linked with better cognitive skill scores on tests. Speech problems and muscle strength also improved more rapidly, with indications of improved functional capacity 12 and 30 days after the start of treatment. During a stroke, the blood supplying vital parts of the brain is interrupted, often leading to impaired memory and a decline in organizational and reasoning skills among stroke survivors. Previous experimental studies in animals have suggested that ginkgo biloba protects against the nerve cell death associated with blood clots in the brain, possibly by increasing blood flow in the cerebral arteries.