Bioforce A.Vogel Ginkgo Biloba, One of the oldest medicinal herbs known to Man, the fresh green leaves of the Ginkgo biloba tree are gathered in spring to create this beneficial tincture. This is probably one of the oldest medicinal herbs known to Man. Its use can be traced to the oldest Chinese Materia Medica dating back to around 3,000 BC. Traditional Chinese medicine describes the ability of Ginkgo leaves to benefit the brain. Today, numerous clinical trials have shown Ginkgo’s ability to improve brain function and therefore quality of life.