Potatoes were then added to lunch and dinner, either as mash, oven-roasted wedges or potato salad.
The results, which were published in the Journal of Medicinal Food, showed both diets contributed to weight loss, but those who ate potatoes lost 12.8lbs (5.8kg) on average, compared to those eating beans who lost 8.8lb (4kg).
Professor Candida concluded: “The individuals who participated in our study lost weight,” and she said the key to success was following a varied diet.
“People typically do not stick with a diet they don’t like or isn’t varied enough,” she added. “The meal plans provided a variety of dishes, and we showed that a healthy eating plan can have varied options for individuals striving to eat healthily.”