Polyphenols are a category of nutrient compounds naturally found in plant foods, such as fruits, vegetables, herbs, and spices. They have multiple health benefits.
They can act as antioxidants, to neutralize harmful free radicals that would otherwise damage your cells and increase your risk of disease. Source National Institutes of Health Library Free Radicals, Antioxidants in Disease and Health (nih.gov)
Polyphenols are also thought to reduce inflammation, which is thought to be the root cause of many chronic illnesses
Source National Institutes of Health Library The inflammation theory of disease (nih.gov)