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Garlic
It was introduced to Europe during the Neolithic, has multiple health benefits and it is a powerful aphrodisiac. Used almost exclusively in Southern European diets and even there it is kinda criminalized because of its smell. As Dr Darknesswin has pointed out, ancient Greek will consume raw garlic so they can fuck their enemies better.
Potato
It was introduced ito Europe ~500 years ago from Latin America, it has very few health benefits and it can be posinous. Used in every European diet, often with butter and other dysgenic fats.
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