Eggs are one of the most nutrient dense foods they're relatively cheap to buy and have a long shelf life. In the 1950s before there was any big advertising for eggs in the US, here in the UK people were instructed to go to work on an egg as part of a popular marketing campaign. The idea was that if you ate an egg for breakfast this was the best way to start the working day. Eating eggs alongside other food can help our bodies absorb more vitamins,. They can make us feel full for longer and one study found that adding an egg to salad can increase hammed Vitamin E we get from the salad.