Oak grows in parts of Europe and and in some parts of North America.
The fruits are called acorns and are traditionally symbols of fertility. The acorns can be strung into necklaces.
Oak contain suger, pectins, starch and protein but the main components are the tannins which give powerful astringent properties.
Part used: Bark.
Don't use oak extract in the eyes since it can dry out the eye mucosa. Don't use of you are pregnant or nursing. Don't take for more than 4 days.
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