Below is the breakdown of the type of complaints since November 2008.

BBC: Complaints against London's bus drivers on the rise

They do know that it seems to work by speeding up the breakdown of triglycerides, a type of fat.

CNN: Gene mutation protects against milk shakes and other fatty fare

Type in your itinerary and the site will give you an hour-by-hour breakdown of when to sleep and when to go outside and seek sunlight.

BBC: Online calculators combat jet lag