Scientific differences between tea and coffee

Tea and Coffee plants are members of the evergreen family. If allowed to grow naturally, both would develop into fairly large trees.
Molecular composition
Tea contains tannin, catechin, Vitamin E, Vitamin C, Natural fluorine and Polysaccharides. tannin and catechin have been associated with preventing cancer and heart disease Coffee contains caffeine, trigonelline, chlorogenic acid, phenolic acid, amino acid, carbohydrates, minerals, organic acids aldehydes, ketones, esters, amines, and mercaptans. Some antioxidants in coffee have been associated with fighting disease or enhancing health.
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