pay attention to the labels. You should be buying organic, when possible. These are certified by the USDA and are free from antibiotics, vaccines and hormones. As for color, that’s your call. The difference in color just varies based on the type of chicken—they both have the same nutritional value.
“Free-range” and “pastured” hens have different nutritional profiles than those of hens raised only indoors, but the nutritive value is hard to predict without knowing what the hens eat. It can depend on how much and what kinds of plants and insects they have access to. Chickens with access to pasture may have more fat, omega-3 fatty acids, vitamin E and beta-carotene in their eggs (Anderson 2011; Karsten et al. 2010).
Hens that are not confined to cages, hence the term “cage-free eggs” don’t necessarily get outside to graze so their eggs are more than likely not going to be nutritionally different from those of caged chickens.
Hens that eat organic feed produce organic eggs. They may spend more time