Podcasts > Stuff You Should Know > Short Stuff: All About Egg Colors

Short Stuff: All About Egg Colors

By iHeartPodcasts

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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Short Stuff: All About Egg Colors

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Short Stuff: All About Egg Colors

1-Page Summary

Egg Color and Pigmentation

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.

Two Key Pigments: Biliverdin and Protoporphyrin

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.

Egg Nutrition and Quality

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.

Sourcing and Handling of Eggs

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

Additional Materials

Actionables

  • You can start a simple egg color chart to track the variety of eggs you buy or collect, noting the breed when possible. This can be a fun way to become more familiar with the diversity of eggs and can help you make more informed choices when purchasing or if you decide to raise chickens. For example, if you buy eggs from a farmers market, ask the vendor about the breed and jot it down alongside the egg color in your chart.
  • Create a kitchen experiment by comparing the taste of eggs from different sources. Buy a batch of pasture-raised eggs and a batch from conventional sources, then cook them in the same way and do a taste test. This can help you determine if you can discern a difference in flavor and if the potential nutritional benefits are worth the cost for you.
  • Develop a habit of checking egg storage recommendations when purchasing from different sources. If you buy eggs directly from a farm, ask the farmer about their cleaning process and whether the eggs have retained their natural coating. This will guide you on whether to refrigerate them or not, ensuring you're storing your eggs correctly to maintain freshness and safety.

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Short Stuff: All About Egg Colors

Egg Color and Pigmentation

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.

Chicken Breeds Lay Eggs With Various Shell Colors Due to Pigment Deposition

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.

Egg Color Pigments: Biliverdin (Green/Blue) and Protoporphyrin (Reddish-Brown)

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.

Egg Color Determined by Genetics and Physical Traits

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.

Eggs Are ...

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Egg Color and Pigmentation

Additional Materials

Actionables

  • Start a personalized egg color chart by collecting eggshells from your kitchen. After using eggs in your cooking, rinse and dry the shells, then arrange them in a spectrum based on their color. This visual collection can serve as a conversation starter about genetics and the diversity of egg colors when you have guests over.
  • Create a natural dye color guide using eggshells as a canvas. Experiment with natural dyes made from vegetables, fruits, and spices to paint the white eggshells. This can help you understand how different substances interact with eggshell surfaces, and you can use your decorated eggs as eco-friendly decorations.
  • Engage with local farmers or poultry enthusiasts to ...

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Short Stuff: All About Egg Colors

Egg Nutrition and Quality

Josh Clark and Chuck Bryant debunk common myths about egg nutrition, particularly regarding the color of eggshells.

No Nutritional Difference Between Brown and White Eggs

Chicken Breed, Not Egg Color, Determines Nutrition Content

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.

Pasture-Raised Chicken Eggs May Have More Omega-3s

Bryant points out that while the eggshell color does not dictate nutrition levels, the diet and lifestyle of the chicken can influence the ...

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Egg Nutrition and Quality

Additional Materials

Counterarguments

  • While the breed of the chicken is a primary factor in determining egg color, genetics and other factors can also play a role.
  • The assertion that there is no nutritional difference between brown and white eggs may be generally true, but individual farming practices can lead to variations in nutrient content regardless of egg color.
  • The claim that pasture-raised eggs have more omega-3 fatty acids and vitamins might require more context, as the specific diet and environment can vary greatly among pasture-raised systems.
  • The comparison between pasture-raised, cage-free, and free-range chickens could benefit from a more nuanced discussion, as these terms can have different meanings and standards in different regions or under different certification programs.
  • The impact of the chicken's diet on egg nutrition might be more complex than simply being pasture-raised, as the specific composition of the diet and the chicken's health also play ...

Actionables

  • You can start a simple egg journal to track the types of eggs you consume and any noticeable health changes. By noting down the breed of chicken (if known), the color of the egg, and whether it's pasture-raised, cage-free, or free-range, you can monitor over time if there's a correlation with how you feel or any changes in your health markers. For example, if you start eating more pasture-raised eggs, note any differences in your energy levels or skin health.
  • Create a shopping guide for eggs based on your dietary goals, prioritizing omega-3 and vitamin content. If your goal is to increase your intake of omega-3 fatty acids, make a list of local suppliers that offer pasture-raised eggs and compare prices and accessibility. This way, you can make informed decisions while grocery shopping without being swayed by misconceptions about eggshell color.
  • Experiment with your own egg taste test to see if y ...

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Short Stuff: All About Egg Colors

Sourcing and Handling of Eggs

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.

Room Temperature for Local Eggs, Refrigeration for Washed Eggs

When it comes to storing eggs, the treatment prior to distribution makes all the difference.

Natural Coating on Eggs Prevents Bacteria Entry

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.

Washing Removes Coating, Necessitating Refrigeration to Prevent Bacteria

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.

Choose "Certified Humane" Eggs for Ethical Chicken Raising

The duo reflects on the importance of considering the ethics of chicken raising when purchasing eggs.

Commercial Eggs: Affordable but Unethically Sourced

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 ...

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Sourcing and Handling of Eggs

Additional Materials

Counterarguments

  • Local eggs stored at room temperature may still pose a risk if the natural coating is compromised or if they are kept for an extended period, potentially leading to bacterial growth.
  • Not all consumers have access to local eggs, making refrigeration of washed eggs a necessary and safe practice for many.
  • Ethical certifications like "certified humane" can increase the cost of eggs, making them less affordable than suggested, especially in certain regions or markets.
  • Small-scale local producers may not always have the means to consistently meet the demand or quality control standards that larger commercial operations can achieve.
  • The affordability of eggs from local producers compared to store-bought eggs can vary widely depending on geographic location, availability, and the scale of the local operations.
  • The assumption that eggs from local producers are less expensive than store-bought eggs may not hold tr ...

Actionables

  • You can create a dedicated egg storage area in your pantry to keep local eggs at room temperature safely. By designating a specific basket or container away from strong-smelling foods, you ensure the eggs maintain their natural protective coating and are easily accessible for use.
  • Start a conversation with your local grocer or farmers' market vendor about sourcing eggs from small-scale, ethical producers. By expressing interest and willingness to purchase these eggs, you can encourage the availability of ethically sourced eggs in your community and potentially influence others to make similar choices.
  • Organize a ne ...

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