Kratom (Mitrogyna Speciosa) is a tree indigenous to South East Asia, with leaves containing the psychoactive alkaloids mitragynine and 7-Hydroxymitrogynine. It has a long tradition of use by farmers and other manual workers in its native region, who claim it increases productivity. In recent years, the leaves of this plant (usually prepared as a tea) have been gaining popularity internationally, especially in the US. Whilst not under international control (as is often the case with ethnobotanical psychoactives) its legality varies between regions and countries. Little is known about extent of use in Europe, particularly in countries where it is illegal such as the UK, having been controlled under the Psychoactive Substances Act since 2016.