It explained more about how it works: “Kava affects the brain and other parts of the central nervous system.
“Chemicals called kavalactones that are found in kava are believed to be responsible for its effects. People commonly use kava for anxiety.
“It’s also used for stress, withdrawal from drugs called benzodiazepines, sleeping problems, and many other purposes, but there is no good scientific evidence to support many of these uses.”
The service states that kava should only be taken for up to six months.