Peppermint tea is a rink that is either a mixture of tea and peppermint (Mentha piperita) or a tisane (infusion) of peppermint alone. This drink is said to have health benefits. It is sometimes called mint tea, although there are other kinds of mint that could be used in that case. Pure peppermint tea is naturally caffeine-free, although when peppermint is mixed with other tea this may cease to be the case.