Relative to epinephrine, which is produced and stored primarily in the adrenal glands, norepinephrine is stored in small amounts in adrenal tissue. Its major site of storage and release are the neurons of the sympathetic nervous system (a branch of the autonomic nervous system).
Fruits with high levels of polyphenols include black chokeberries, black elderberries, strawberries, red raspberries, blueberries, plums, and black currants. Cocoa powder, dark chocolate, coffee, tea, and flaxseed meal are also high in polyphenols.
This includes several types of food and parts of foods: 1  Plant-based foods, including naturally-occurring chemicals called phytochemicals such as: Carotenoids, found in red, orange, yellow, and some dark green vegetables. Polyphenols, which are found in herbs, spices, vegetables, green tea, apples, and berries.