Gingko (Gingko biloba), by helping to improve blood circulation to the central nervous system, aids in dementia and strengthens the blood vascular system and decreases the possibilities of clots.
Evidence suggests taking 250 mg of 30–60 minutes of Ginkgo biloba before bed may help reduce stress, enhance relaxation and promote sleep.
You can use 1 tablespoon of fresh leaves in one cup of boiling water to make a tea. Add a sweetener to it if you wish. Alternatively you can shade-dry leaves, preferably on a screen (so there is good air circulation all round).