A problem with dieting rules is that only a small violation—a sneaky slice of cake, for example—is enough to derail the whole diet. Researchers call this the “<a href="https://www.psychologytoday.com/blog/changepower/201111/beware-the-what-the-hell-effect-especially-holidays">what-the-hell effect</a>”.&nbsp;Diets that require the dieter to follow rigid rules or forbid them from consuming foods they enjoy appear to be problematic, as they paradoxically increase the risk of overeating.&nbsp;

The “what-the-hell” effect

When we are hungry, the hormone ghrelin stimulates the brain. Our brains pay more attention to cues for unhealthy foods—those which are high in sugar and fat—than healthy foods when we are hungry. It may be possible to train ourselves to ignore tempting cues.

Food cues

Dieting often involves “giving up” more pleasurable foods in an attempt to reduce calorie intake. But if we are asked to avoid eating the food we enjoy, researchers have found that we will crave it.The behavioral and cognitive response to deprivation may inadvertently be creating more temptation.

Forbidden foods are more tempting

The UK's diet industry is thriving to say the least. More than half of British adults try to lose weight by controlling their calorie intake each year. Unfortunately, losing weight is not as easy as turning down a biscuit, or opting for salad.

Food cues

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