There are numerous compounds that are in our foods that make them bitter. In addition, bitterness comes from a variety of sources. Plants, some fruits and vegetables, and certain leaves and seeds, are sources of bitterness. The spices in this picture contain just a few examples of bitter compounds taken from plants. Other sources of anise are taken from green leaves.
Mace comes from the seed covering of a plant.
Nutmeg is also taken from a plant seed. Nutmeg, mace, anise seed with bitter compounds. People who enjoy wine, know that they too can be bitter depending on the variety of grape being used. The most used bitter substance is coffee. Through the process of roasting the green coffee bean until it turns brown, the beans will develop a more acceptable favor and aroma.