Keeping a food diary -- a detailed account of what you eat and drink and the calories it packs -- is a powerful tool in helping people lose weight, U.S. researchers said on Tuesday.
The study involving 1,685 middle-aged men and women over six months found those who kept such a diary just about every day lost about twice as much weight as those who did not.
The findings buttressed earlier research that endorsed the value of food diaries in helping people lose weight. Companies including Weight Watchers International Inc use food diaries in their weight-loss programs.
"For those who are working on weight loss, just writing down everything you eat is a pretty powerful technique," Victor Stevens of Kaiser Permanente's Center for Health Research in Portland said in a telephone interview.