Juglans regia variations in fatty acid content of the nuts: Walnuts and other tree nuts are important food-allergen sources that have the potential to be associated with life-threatening, IgE-mediated allergic reactions in some individuals. Certain extracts of walnuts have "in vitro" antioxidant and antiproliferative activity due to a high phenolic content. "Juglans regia" is used to treat Diabetes mellitus symptoms in Austrian traditional medicine, whereby air-dried leaves are used as aqueous decoction or liquor preparation and are consumed on a daily basis. In Skopelos, a Greek island in the Aegean Sea, local legend suggests whoever plants a walnut tree will die as
Fruit (slang) presently defined as male testicles from the Cockney rhyming slang "cobbler's awls", meaning "balls" and "blow" was the blossoming of a fruit tree and is widely used as the Polari definition for oral sex on a man causing him to "blow"(ejaculate). "Fruitcakes", which are cakes containing both fruit and nuts, have been in existence since the Middle Ages, but it is unclear when the term started being used disparagingly, especially in the United Kingdom and the United States, as a slur for a 'crazy person' (e.g. "he's a complete fruitcake") although "Cassell's Dictionary of Slang" traces uses of "fruitcake" meaning