In second place, colonic irrigation is considered to be one of the biggest wastes of money. In colonic hydrotherapy, the somewhat undignified procedure lasts about 30-45minutes and involves water slowly being pumped into the colon to cleanse it before being pumped out.

However, 93% of GPs have warned that these types of celebrity endorsed alternative treatments, which they say has no medical backing, could be putting the public at risk.

Liv Tyler is one of many stars who is said to be a fan.