There are several tastes that our body recognizes - sweet, sour, salty, astringent, but the one that is most important for our health is the bitter taste, especially for digestion. Every culture has used certain bitter foods and bitter drinks in the diet of its people. There is a reason for this. The bitter taste stimulates and balances.
The American diet is practically devoid of the bitter taste. Most of our foods are either sweet or salty. As mentioned, every culture has this bitter taste from special foods in their diet. Ours does not.