Phenol is found to be present naturally in coal tar and creosote. It is also produced during natural fires, and through benzene degradation in the atmosphere under the influence of ultraviolet light radiation [14].

What are phenols found in?

Food Free and bound phenol compounds are found naturally in foods. High phenol foods include tomatoes, apples, peanuts, bananas, oranges, cocoa, red grapes, colored fruits (e.g., cranberries), and milk.

Where are phenols found in plants?

In plants, the phenolic units are esterified or methylated and are submitted to conjugation, which means that the natural phenols are mostly found in the glycoside form instead of the aglycone form.