Complementary and Alternative Medicine / Antioxidants / Humans / Standard Deviation / Drug Design / Complementary and Alternative Medicine in the Health Service / Lipid peroxidation / High Pressure Liquid Chromatography / Antioxidant Activity / Plant extracts / Time Factors / Water soluble polymers / Statistical Test / Ginkgo Biloba / Complementary and Alternative Medicine in the Health Service / Lipid peroxidation / High Pressure Liquid Chromatography / Antioxidant Activity / Plant extracts / Time Factors / Water soluble polymers / Statistical Test / Ginkgo Biloba