But polyphenols are found in all parts of plants, especially the peel, so there’s another reason (in addition to avoiding food waste) to use those frequently-thrown out odds and ends.

The NHS doctor talked up the benefits of these two popular food items in being able to help protect the brain.

The best polyphenol supplement should contain a variety ... The supplement is easy to take and can be added to food or drink. It is also third-party tested, ensuring that it is safe and effective.