Anise awakes interest for its characteristic taste and smell, however it has medicinal properties as well. This plant is know for its carminative effect, so it helps to avoid problems related to excessive gas accumulation inside the body. At the same time it could increase the appetite. Others say also that anise provides a valuable aid to dry cough.
An important aspect to remember appears at the moment of using hot water to acquire the active ingredients as it's possible that some of them stay in the bottom of the recipient. So the user should remove with a spoon and drink while they still are in suspension.
Very easy to find, natural and no known side-effects except star anise with a neurotoxic character in some circumstances.