and Nutritional Analysis looking at six different kinds of eggs and the way the birds are raised.
Fast Food outlets linked to Canadian obesity rates, with Windsor ON in the #4 position.
CBC Marketplace Great Eggspectations: A 2007 documentary analyzing the nutritional differences of different types of eggs. (link to video has since been removed)
Eggs - Unscrambling the Confusion- Jen Allbritton, CN: Most egg-laying factories force the animals to live in a windowless, insulated, and overcrowded environment. They are also usually exposed to artificial day/night cycles designed to stimulate egg production. Sunlight itself is a necessary nutrient and chickens raised in it produce more eggs and eggs with lower cholesterol content. Commercial chickens are fed rations that typically contain preservatives, mold inhibitors, antibiotics, and pesticides to encourage weight gain and prevent disease breakouts because of the unhealthful conditions. Naturally, all of these factors directly affect the quality of the eggs produced.
Effect of free-range feeding on n−3 [omega 3] fatty acid and α-tocopherol [Vitamin E] content and oxidative stability of eggs: The concentration of omega 3 fatty acid was almost threefold higher in eggs from hens fed on free-range. On the other hand, the concentration of omega 6 fatty acids was higher in eggs from hens fed the commercial diet in confinement.
Authors: Lopez-Bote C.J.1; Sanz Arias R.; Rey A.I.; Castano A.; Isabel B.; Thos J. Source: Animal Feed Science and Technology, Volume 72, Number 1, May 1998 , pp. 33-40(8)
Health Benefits of Grass Fed Products: You may be getting more folic acid and vitamin B12, two very important vitamins [from free range eggs]. This information comes from a British study published in 1974. At the time, British consumers were concerned about the trend toward factory farming. Specifically, they thought factory eggs might not be as nutritious as eggs from free-ranging birds. An elaborate study confirmed their suspicions. The eggs from free-range hens contained significantly more folic acid and vitamin B12. A. Tolan et al, "Studies on the Composition of Food, The chemical composition of eggs produced under battery, deep litter and free-range conditions." Br. J. Nutrition, (1974) 31:185.
Mother Earth News: Nutritional values of different types of eggs: Our testing has found that, compared to official U.S. Department of Agriculture (USDA) nutrient data for commercial eggs, eggs from hens raised on pasture may contain: