All about fruitarianism with a long-term fruitarian, Lena

Leaves and stems of plants, green vegetables or leafy greens, are widely consumed by humans. The protein contents are higher than in fruits, and they contain low amounts of sugar.

Some green vegetables produce secondary metabolites that have bitter or astringent properties and may produce toxic alkaloidal and other compounds such as hemoglutenens. Others produce intestinal enzyme inhibitors, such as lectins, which bind to mucosal surfaces and inhibit digestion, especially that of proteins. 


Plant secondary metabolism produces a large number of specialized compounds (~ 200.000) that do not aid in the growth and development of plants but are required for the plant to survive in its environment. Specialized compounds from secondary metabolism are essential for communicating with other organisms in mutualistic (e.g. attraction of beneficial organisms such as pollinators) or antagonistic interactions (e.g. deterrent against herbivores and pathogens). They further assist in coping with abiotic stress such as increased UV-radiation.

The broad functional spectrum of specialized metabolism is still not fully understood.

Well known specialized compounds include alkaloids, polyphenols including flavonoids, and terpenoids. Humans use quite a lot of these compounds, or the plants from which they originate, for medicinal and nutraceutical purposes.

New Comments

  • Let me match your behavior, Lena, as the ethical fruitarianism author that you are, to that of a fruit ...

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  • So, which one is the article you mention, Lena?

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  • I don't feel like having implied a “mechanical element” concept. I guess you mention it to your liking ...

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  • This is beautiful: “From philosophical perspective, veganism is a subset of fruitarianism, because ...

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  • Feedback, besides the name of this page, is a nice encoding of what I am about to say here. Pumpkin seeds ...

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Carl Sagan

A sharp distinction between humans and “animals” is essential if we are to bend them to our will, make them work for us, wear them, eat them–without any disquieting tinges of guilt or regret. It is unseemly of us, who often behave so unfeeling toward other animals, to contend that only humans can suffer. The behavior of other animals renders such pretensions specious. They are just too much like us.

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