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Overview. 1  Quinine, a bitter tasting powder made from the bark of the cinchona tree, is known mainly for its use in malaria treatment. 2  Tonic water, a bitter liquid sometimes used as a mix for alcoholic drinks, contains only a small amount of quinine compared to quinine medications.
Sources of Carotenoids (Try to eat 2-4 servings of deeply colored fruits and vegetables at every meal. Use herbs and spices liberally.). Chinese Herbal Medicines: Some of the richest sources of carotenoids are found in these Chinese Herbal Medicines: Lycium barbarum fruit, Gou Qui Zi, commonly known as Goji Berry.