Black tea was first developed during the late Ming Dynasty (before 1644). All true tea comes from the leaves camellia sinensis bush. It is how the leaves are processed that determines which type of tea it becomes.
Black tea goes through a process which starts with drying, called oxidization. According to Artful Tea, black teas are often macerated during the oxidation process, allowing all parts of the tea leaves to be exposed to air and fully darken. This helps to create the strong, rich flavor of the tea. Unlike other tea types, black teas are fully oxidized, resulting in a dark, full-bodied cup that contains higher levels of caffeine. Black tea contains about 47 mg of caffeine per cup, about half the caffeine in a cup of coffee.
There are many health benefits to enjoying a good cup of tea, but perhaps the best benefit of tea comes to the soul. We embrace William Gladstone's famous poem.
"If you are cold, tea will warm you;
if you are too heated, it will cool you;
If you are depresses, it will cheer you;
If you are excited, it will calm you."