The fear of missing out (FOMO) prevents people from dieting.
Research shows that people are worried about missing out on snacks such as chocolate and fish and chips when attempting to slim down.
Many are also concerned about missing out on dinner parties with friends, according to a new study by Slimming World.
Dr. Amanda Avery, a consultant dietician for the company, said: "Food is one of life's greatest pleasures so it's no wonder food FOMO is a very real factor for many of us when it comes to losing weight. In many cases certain foods can have a powerful pull on us, evoking memories and emotions and rekindling flavours and pleasures experienced in the past.
"Often, finding the desire or motivation to alter deeply ingrained habits around the way we shop, cook and eat can be challenging and that's where support can be crucial to help slimmers."