Good cholesterol

 An American website has published an article on the benefits of eating eggs. Here is part of the piece published by Mashed.com. 

An egg contains almost every nutrient needed by humans and can be considered a superfood. Although eggs are high in cholesterol, they can raise levels of HDL(high-density lipoprotein) which is ”good" cholesterol. This has been found to decrease the chance of stroke and heart disease in some people. The amount of nutrients in an egg dramatically depends on the diet and environment of the hens producing them.

supermarket eggs usually come from caged chickens fed a vegetarian diet. Because this is not their natural diet, it results in a less nutritious egg.

eggs of free-range hens that are allowed to forage for their food have much higher amounts of omega-3 fatty acids, as well as more vitamins and nutrients
Another benefit of eggs from freerange chickens is that they are less likely to be contaminated with Salmonella.  Salmonella infections are more likely to occur in chickens that are subjected to conditions of industrial egg farms. Free-range chickens are less likely to be infected by a salmonella outbreak because they aren't packed into cages or sheds with other hens where the bacteria can spread more easily. Consumers are increasingly more concerned with where their food comes from, and they prefer buying eggs laid by happier, healthier chickens.