Cost Per Serving (1 egg): 17¢
Why eggs are so good for you: For such a small and inexpensive food, eggs pack in a lot of nutrition. The whites are brimming with protein (4 grams per egg), while the yolks deliver some vitamin D plus a lutein and xeanthanin, which lowers the risk of age-related macular degeneration—a disease that affects one in eight Americans with vision loss and sometimes blindness. All that for 80 calories. (There’s a reason they’re touted as the “incredible, edible egg”.)