This is another innocent food that has been somewhat tarnished in the past as being unhealthy. Oh, how little we knew then! Eggs are pretty much the best protein source on the planet for the simple reason that the protein is 100% useable. They were for so long deemed as being terrible for heart health as they contain cholesterol. We have known for several years now that eating a dietary source of cholesterol, has zero impact upon blood cholesterol levels. It is dietary fat and carbohydrate sources that will impact upon cholesterol levels and heart health.
Heart & circulation
Eggs are very rich in betaine, a nutrient known to reduce homocysteine, which is a potent compound linked to increased risk of heart disease.
Nervous system health
Eggs are also very rich in choline, which helps to maintain the structural integrity of the fatty structures surrounding our nerve cells. This makes them helpful for nervous system health, from the perspective of basic maintenance if nothing else.