A study of a diet of potatoes, apples, and vegetables has found that they may help prevent diabetes and the development of the thyroid.
The study, published Thursday in the New England Journal of Medicine, found that potatoes and apples with a low-glycemic index (or GI) helped reduce insulin levels and insulin resistance in people with type 2 diabetes.
People with type 1 diabetes are more likely to develop the disease because they are insulin resistant.
Low-GI potatoes, like blueberries and sweet potatoes, have been found to be effective in lowering insulin and lowering blood sugar levels.
Low-GI apples and potatoes were also associated with a lower risk of developing type 2 diabetic thyroiditis, the study found.
While there was no evidence that eating potatoes or eating low-GI vegetables would reduce blood sugar, the researchers said the study shows that eating a high-glycaemic index diet may have an effect on the development and progression of the disease.
Low GI vegetables and potatoes are commonly found in the U.S. diet and are eaten to provide nutrition.
The U.K. National Institute for Health Research has been conducting a large-scale study on the diets of more than 1,200 people to understand the impact of diets rich in vegetables and fruit.