Black tea is one of the most beloved drinks in the world with almost 80% of humans consuming it. Black tea is created when the leaf is entirely oxidized. The process of making black tea always involves withering, rolling, oxidizing, and drying the tea leaves. During this process, flavanols (catechins) oxidize with the air to create the flavors and the color that makes this tea unique. The most consistent description of a black tea is strong, full bodied flavor, and a dark-brown infusion.