The report published on Tuesday - part-funded by the UK's Civil Aviation Authority (CAA) - looked more at changes in the averageweight and height of passengers in the past few decades than the highly-publicised fears over so-called "traveller's thrombosis".
For example, the averageweight for a passenger traveling in the summer (including carry-on luggage) went from 180 pounds in 1995 to 190 pounds in 2003.
In one study, the averageweight loss for a group taking a higher dose (32 mg) of naltrexone plus bupropion for about a year was 6.1% while for a lower dose (16 mg) it was 5%. (People taking a placebo had an averageweight loss of 1.3%.) However, only half the participants who started the trial actually finished it.