Iced tea is a cold drink, is first prepared for the hot tea and then rapidly cooled with ice cubes. Tea that cools slowly, tends to be bitter, which is avoided by the rapid cooling.
Traditional recipe is a tea made from black tea with lemon and sugar or sweetener. Other variations are made with greens, fruit or herbal tea or combinations of these teas or combinations of fruit juice. Iced tea is often served with a slice of lemon or mint and some ice cubes to keep it cool. The U.S. " Iced Tea", which is especially popular in the southern states, is traditionally served either very strong ( sweetened ) or not sweetened ( unsweetened ).
Iced tea is also available in many industrially produced variants which are usually heavily sweetened in Germany.
In British and American cookbooks can be found already in the early 19th century recipes for tea drinks chilled. The iced tea was popularized in 1904 by Englishman Richard Blechynden. This was responsible for the World's Fair in St. Louis for the tea and should convince Americans of black tea, who knew by then only green tea. Blechynden saw himself confronted with the problem that hot tea in record-breaking summer of 1904 would be deprecated, so he came up with the idea to cool the tea cooled by lead pipes.
Industrially produced ice tea is often added sugar and citric acid ( E330 ) in large quantities. The consumption of foods that contain a larger amount of citric acid may lower the pH of the saliva strong. At the Center for Dental Medicine, University of Zurich researchers found, moreover, that in case of excessive consumption can cause this without rinsing that minerals are washed out of the teeth, which can lead to tooth damage especially in combination with large amounts of sugar. For young children this is dangerous, because their baby teeth are still sensitive.