Ginkgo biloba leaves contain flavonoids and polyphenolic compounds that may enhance physical and cognitive performance. In this study, 18 healthy, physically active young men took a placebo or 160 mg of ginkgo biloba per day for six weeks.
Before and after the supplement period, the men performed a graduated cycling test that measured maximum oxygen capacity. Both groups saw an increase in oxygen capacity between the two test periods, but the ginkgo biloba group increased 6 percent compared to 1 percent for placebo.
The ginkgo group also saw an increase in antioxidant capacity, and an increase in a protein that influences a number of brain functions, including stimulating growth of new neurons and synapses—nerves and nerve-signaling pathways.
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