Eggs have been found to improve glucose balance and have been linked to a lower risk of type 2 diabetes and lower blood glucose levels.
Men in the study who ate four eggs a week had a 37pc lower risk of type 2 diabetes than those who only ate one egg a week.
But eating more than four eggs did not bring any significant additional benefits.
The study of the dietary habits of 2,332 men aged between 42-60 years was carried out by the University of Eastern Finland with a follow up almost 20 years later.
The improvement in diabetes risk persisted even when factors like physical activity, body mass index, smoking and eating fruit and vegetables were taken into consideration.
The findings are published in the American Journal of Clinical Nutrition.