On the Stuff You Should Know podcast, Josh Clark and Chuck Bryant explore egg color variations and the role of pigments like biliverdin and protoporphyrin. They dismantle the myth that brown eggs are more nutritious than white ones, explaining that nutrition depends on the chicken breed and lifestyle factors like a pasture-raised diet.
The hosts also provide insights into ethical egg sourcing, suggesting local small-scale producers or certified humane eggs that ensure humane chicken living conditions. Additionally, they differentiate between farm eggs that can be stored at room temperature and commercially washed eggs that require refrigeration.
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As Chuck Bryant shares, different chicken breeds lay eggs with a range of colors like olive, brown speckled, and light tan due to pigment deposition on the eggshells.
According to Josh Clark and Chuck Bryant, the pigments biliverdin and protoporphyrin account for egg color variation. Biliverdin creates green/blue eggs, while protoporphyrin results in reddish-brown hues.
Chuck Bryant explains that a chicken's genetics and physical traits like earlobe color can indicate the eggs' color. White earlobes typically mean white eggs, while colored earlobes suggest colored eggs.
Importantly, Bryant reveals that all chicken breeds inherently lay white eggs made of calcium carbonate. It's only certain breeds that add pigments for color.
Clark and Bryant debunk the myth that brown eggs are nutritionally superior to white eggs. As they emphasize, it's the breed - not shell color - that determines an egg's nutritional content.
While shell color has no bearing on nutrition, Bryant notes that pasture-raised chickens tend to produce eggs higher in nutrients like omega-3s due to their enriched foraging diet. This lifestyle factor can impact egg quality more than color.
The way eggs are handled pre-purchase affects whether they should be refrigerated or can be kept at room temperature, Clark and Bryant explain.
Farm eggs retain their natural waxy coating that prevents bacteria entry, allowing room temperature storage. But commercially washed eggs must be refrigerated since their coating is removed.
For ethical egg sourcing, Bryant suggests local small-scale producers or seeking out "certified humane" eggs, which ensure chickens are raised in humane conditions with freedom to roam and forage a natural diet.
1-Page Summary
Chuck Bryant discusses the fascinating variety of egg colors produced by different chicken breeds, which is largely due to the deposition of pigments on the eggshells.
Chuck Bryant shares his experience with eggs in a kaleidoscope of colors including olive, brown speckled, and light tan, which he encountered through his friend Justin who raises chickens.
Josh Clark and Chuck Bryant identify biliverdin and protoporphyrin as the pigments responsible for the diverse range of chicken egg colors. Biliverdin results in green or blue eggs, while protoporphyrin imparts a reddish-brown hue. They explain that the green and blue shades of eggshells are due to biliverdin, while protoporphyrin is responsible for the reddish-brown colors. They also note that this pigmentation process occurs in other bird species as well, such as robins who lay blue eggs.
Josh Clark explains that a chicken's earlobe color can hint at the color of eggs it will lay; white earlobes or feathers typically indicate the chicken will lay white eggs, while colored earlobes and feathers usually mean the chicken will lay colored eggs.
Egg Color and Pigmentation
Josh Clark and Chuck Bryant debunk common myths about egg nutrition, particularly regarding the color of eggshells.
Clark and Bryant assert that there is no nutritional difference between brown and white eggs. They emphasize that the color of an eggshell does not affect the nutritional value of the egg itself; instead, it's the breed of the chicken that determines the color of the egg it lays. Clark dismantles the misconception that brown eggs are more natural or that white eggs are somehow bleached, clarifying that white eggs come from leghorn chickens without any color alteration.
Bryant points out that while the eggshell color does not dictate nutrition levels, the diet and lifestyle of the chicken can influence the ...
Egg Nutrition and Quality
In the quest for fresh eggs, understanding sourcing and storage is crucial. Josh Clark and Chuck Bryant discuss why it might be better to keep local eggs out of the fridge and seek out ethically sourced eggs.
When it comes to storing eggs, the treatment prior to distribution makes all the difference.
Clark and Bryant explain that eggs fresh from the farm typically retain their natural waxy coating, which acts as a barrier to bacteria. This coating preserves the integrity of the shell and the freshness of the egg within.
However, once eggs are washed, which is a common commercial practice, this protective barrier is removed. As a result, washed eggs must be refrigerated to prevent bacterial invasion that could lead to spoilage or foodborne illness.
The duo reflects on the importance of considering the ethics of chicken raising when purchasing eggs.
Commercially available eggs are often affordable, but Bryant gives a hint at their unethical sourcing, suggesting that the price could come at the cost of the chicke ...
Sourcing and Handling of Eggs
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