Brown or white eggs? If you think that the choice is simply a matter of aesthetic or nutritional value, you are wrong.
Gradually, the belief has been established that brown eggs imply superior quality: better living conditions for birds, richer taste and higher nutritional value.
The decision of a major supermarket chain in Britain to discontinue their disposal, moving towards the exclusive sale of white-shelled eggs under their private label, has reignited a debate that many shoppers were probably unaware of. What is the real difference between white and brown eggs? Are cafes healthier or tastier?
According to international poultry organizations, there was a misconception for years that white eggs were artificially bleached, while brown eggs began to be associated in the minds of the public with traditional agriculture and superior quality.
The history of consumer preference
This association was not entirely unfounded, notes the Washington Post. White hens were most often used in industrial poultry farming, as their smaller size allowed more birds to be housed in the same space.
Over time, consumers have identified the colour of the shell with the conditions of prosperity. Thus, brown eggs ended up signalling a less industrialized approach, regardless of whether this corresponded to reality.
It is characteristic that while in countries such as Britain the market is traditionally dominated by brown eggs at a rate of 90%, on the other side of the Atlantic, in the USA, white eggs have always remained the norm, exceeding three quarters of total sales.
Over time, brown eggs also acquired something else: prestige. They have always been on the shelves of traditional grocery stores, while premium brands have based their entire corporate identity on them. The darker the shell and the more orange the yolk, the more buyers identified them with a quality meal.
The scientific reality
The colour of the shell offers a rough estimate of the environmental footprint, albeit with some caveats. In fact, it is not the colour of the egg that matters, but the bird that gave birth to it.
Experts make it clear that the colour of the shell depends solely on the breed of chicken. Brown hens lay brown eggs, and white hens lay white ones. In addition, there are no differences in nutritional value between brown and white eggs, while the scientific community emphasizes that there is no difference in taste, despite the contrary beliefs of some consumers.
The environmental advantage of egg whites
Studies find that white hens are more productive, consuming less food for the exact same production. Buying white eggs indirectly reduces the need for land and water, since feed production is responsible for 50-60% of the environmental impact of poultry farming worldwide.
Also, white hens consume less food, have a longer life expectancy and show higher productivity.
The parameter of bird welfare
However, environmental benefits are only part of the story. Consumers who care about animal welfare are rightly wondering whether efficiency that reduces pollutant emissions is detrimental to birds. Poultry farmers argue the opposite, pointing out that white hens are generally calmer and less prone to pecking feathers compared to brown hens, which translates into less stress, better physical health, and an upgraded quality of life for the animals themselves.
What determines the colour of the yolk
The colour of the yolk is largely determined by natural pigments, carotenoids, which are contained in foods such as corn, calendula, peppers and carrots. A diet rich in these compounds darkens the colour of the yolks, making them more orange. Similarly, excessive consumption of carrots by humans can give the skin an orange tint.
In conclusion, brown shells do not guarantee better conditions for the well-being of birds, nor do orange yolks superior taste. At the same time, neither of them differentiates their nutritional value. That's all.
The colour of the shell does not indicate the nutritional value of the egg, the health status of the hen, or the quality of the omelette.
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