A flavonoid is a type of naturally occurring plant compound found in many fruits, vegetables, herbs, teas and other plant foods. Flavonoids belong to a large family of compounds known as polyphenols and contribute to plant color, protection and other biological functions.
Hundreds of different flavonoids have been identified. They are commonly grouped into subclasses such as flavonols, flavones, flavanones, flavanols, isoflavones and anthocyanins.
Where Flavonoids Are Found
Flavonoids occur throughout the plant kingdom and are found in foods and herbs such as berries, citrus fruits, onions, apples, parsley, tea and cacao.
Different plants contain different types and amounts of flavonoids, and those levels can be influenced by plant variety, growing conditions, ripeness, preparation and processing.
Evidence & Research
Flavonoids are widely studied for their biological activity, including their interactions with oxidative processes, inflammation-related pathways and other functions in the body.
Research findings depend on the specific flavonoid, food or extract being studied. Laboratory activity does not automatically translate into the same effect in humans, and researchers also consider factors such as absorption, metabolism and the amount consumed.
Why Context Matters
Flavonoid describes a large family of compounds rather than one substance with one effect. Different flavonoids can behave differently in the body, so claims about “flavonoids” in general should be interpreted in light of the specific compound, food or preparation being discussed.
Related Terms
Related concepts include polyphenol, anthocyanin, antioxidant and bioactive compound. These terms may overlap in nutrition, herbal and wellness conversations, but they are not interchangeable and each has its own meaning and context.
A Note on Wellness Language
Wellness terms can change over time and may be used differently across scientific, traditional and commercial settings. Our goal is to explain them clearly, distinguish historical meaning from modern marketing, and give enough context for you to make sense of the language you encounter.
A Note on Educational Information
The information in this glossary is provided for educational purposes only. It is intended to explain terminology and provide context, not to diagnose, treat, cure or prevent disease, or replace advice from a qualified healthcare professional.
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Return to the Herbal & Wellness Glossary to explore more terms, preparation methods and wellness concepts used throughout the site.
One plant family of compounds—many different roles. 🌱