"However, many people (about 50 percent of women and 25 percent of men) eat strange combinations of food, drastically reduce caloric intake, and even eliminate entire food groups in the hopes of losing weight."
I'm fairly certain they mean "fad diets" really since the article is about such but it doesn't specifically state that. I'm not sure where they get their percentages either so I'm unsure how reliable it is.
This also has a few good facts about fad dieting that you may be interested in:
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