Try to eat non-cream-based soups, lots of non-starchy vegetables and salads (but watch the dressing and high-fat toppings), and low-fat or nonfat dairy with most meals and snacks to get adequate food volume with fewer calories.

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Previous studies have found that foods with a low glycemic index (typically whole grains, fruits and non-starchy vegetables, which increase blood sugar at a slower rate than more processed foods) generate hormonal changes that could reduce this hunger an effect that protein-rich meals might bolster.

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Foods that are higher in fiber or water, like soup, non-starchy vegetables, and low-fat dairy, have much lower caloric densities, so if your daughter's appetite is limited, these foods should be minimized somewhat as they may fill her up without providing enough calories to help her gain weight.

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The Foods Standards Agency said people should be eating more starchy foods, fruit and vegetables, some protein-rich food and less salt, sugar and fat.

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