β-apo-8'-carotenoic acid ethyl ester and Canthaxanthin: Differences in Poultry Feed Pigmentation

β-apo-8'-carotenoic acid ethyl ester , commonly known as Apo-ester , and Canthaxanthin are both carotenoid feed pigments used in animal nutrition. However, they are different compounds and should not be treated as interchangeable ingredients.

For poultry feed manufacturers, the choice between these pigments depends mainly on the desired pigmentation effect, the existing pigment profile of the diet, the poultry species, and the requirements of the final product.

This article focuses on the practical differences between Apo-ester and Canthaxanthin in poultry feed pigmentation.

1. Apo-ester and Canthaxanthin Are Different Pigments

The first distinction is chemical identity.

β-apo-8'-carotenoic acid ethyl ester is a specific carotenoid compound commonly referred to as Apo-ester.

Canthaxanthin is a different carotenoid compound and is also used as a feed colorant.

Therefore:

Apo-ester ≠ Canthaxanthin

They may both be included in poultry pigmentation programs, but their characteristics and expected color contributions should be evaluated separately.

ZEAPLANT also presents Canthaxanthin as an independent pigment feed additive under its ZEAPLANT®RED product line, rather than combining it with other carotenoid pigments.

2. Their Color Contributions Are Different

One of the most important practical differences is the color direction they contribute to a feed pigmentation program.

Apo-ester is generally associated with a yellow-to-orange pigmentation direction , while Canthaxanthin provides a stronger red coloration .

This difference becomes important when a feed manufacturer is trying to achieve a particular color profile.

The purpose of this comparison is not to determine a universally “better” pigment, but to understand which pigment better fits a particular pigmentation objective.

3. Why Pigment Weight Alone Is Not Enough

A common mistake in feed formulation is to compare pigments only by the number of kilograms added per ton of feed.

For example, adding 1 kg of Apo-ester and 1 kg of Canthaxanthin does not mean that the resulting pigmentation will be identical.

The final result depends on factors such as:

• Pigment concentration in the commercial product
• Chemical characteristics of the pigment
• Existing carotenoids in the feed
• Inclusion level
• Poultry species
• Feeding conditions
• Desired final color

For this reason, feed manufacturers should compare products based on their actual pigment specifications and intended application , rather than simply comparing inclusion weight.

4. The Basal Diet Can Change the Result

Poultry diets may already contain carotenoids from ingredients such as corn and other plant-derived feed materials.

This means that the pigmentation process does not start from zero.

For example, a layer feed containing a relatively high level of naturally occurring yellow pigments may require a different pigment strategy from a formulation with a lower background pigment level.

The same principle applies when comparing Apo-ester and Canthaxanthin.

The practical question is therefore not:

“How much pigment should be added?”

but rather:

“What additional pigment is required after considering the existing pigment contribution of the complete diet?”

5. Apo-ester in Poultry Pigmentation

Apo-ester can be considered when a feed manufacturer wants to introduce a defined carotenoid pigment into a poultry diet.

In layer feed, the pigmentation objective may be related to egg-yolk appearance .

The expected result depends on the complete dietary pigment profile, rather than Apo-ester alone.

For this reason, formulation should take into account:

• Existing dietary carotenoids
• Apo-ester concentration
• Target yolk color
• Feed intake
• Feeding period
• Other pigment sources

The appropriate inclusion level should always be determined using the specification of the actual commercial product.

6. Canthaxanthin in Poultry Pigmentation

Canthaxanthin has a stronger red color contribution and is therefore useful when the pigmentation objective requires greater emphasis on the red component.

ZEAPLANT's ZEAPLANT®RED (Canthaxanthin) is positioned specifically as a pigment feed additive.

This makes Canthaxanthin particularly relevant to pigmentation programs where the desired visual result requires a stronger red tone.

However, the appropriate inclusion level still depends on the complete formulation and applicable requirements.

7. Can Apo-ester and Canthaxanthin Be Used in the Same Pigmentation Program?

Different carotenoid pigments can be considered together when developing a specific pigmentation strategy, provided that the combination is permitted for the intended application and market.

The reason for combining pigments would generally be to influence the overall color profile , rather than simply increasing the total amount of pigment.

For example, a formulation may need to balance yellow and red color contributions to achieve a particular visual target.

In such cases, the feed manufacturer should evaluate the combined effect of the pigments instead of treating each pigment independently.

8. Layer Feed and Broiler Feed Have Different Objectives

The choice between Apo-ester and Canthaxanthin can also depend on the type of poultry production.

Layer feed

For laying hens, pigmentation is commonly associated with egg-yolk color .

The formulation therefore needs to consider the desired yolk appearance and the carotenoids already supplied by the diet.

Broiler feed

Broiler pigmentation programs can have different objectives depending on the market and final product requirements.

Consequently, a pigment strategy developed for layer feed should not automatically be transferred to broiler feed.

9. How Should Feed Manufacturers Choose Between Them?

A practical decision process can be based on four questions:

What color is required?

Determine whether the target is primarily yellow, orange, red, or a combination.

What pigments are already present?

Evaluate the contribution of the basal feed before adding another pigment.

What is the poultry application?

Layer and broiler pigmentation requirements may differ.

What does the product specification show?

The actual pigment concentration and formulation characteristics should be used when calculating inclusion.

This approach is more useful than selecting a pigment solely because it has a higher concentration or lower price.

10. A Simple Comparison for Feed Buyers

For a quick purchasing and formulation reference:

Choose Apo-ester when:
The formulation requires a defined Apo-ester pigment source and the desired pigmentation profile is compatible with its characteristics.

Consider Canthaxanthin when:
A stronger red color contribution is required.

Consider a combination when:
The formulation objective requires control over both yellow/orange and red color contributions, subject to applicable regulatory requirements.

The final decision should always be based on the actual product specification and the requirements of the intended market.

Key Takeaways

The main differences between β-apo-8'-carotenoic acid ethyl ester and Canthaxanthin can be summarized as follows:

• They are different carotenoid compounds .
• Both can be used as feed colorants.
• Apo-ester and Canthaxanthin provide different color contributions.
• Canthaxanthin is particularly associated with a stronger red coloration.
• They should not be substituted on a simple equal-weight basis.
• The basal diet can significantly affect the final pigmentation result.
• Layer and broiler applications may have different pigmentation objectives.
• Product concentration and applicable regulations should be considered before determining inclusion levels.

Conclusion

β-apo-8'-carotenoic acid ethyl ester and Canthaxanthin serve different roles within poultry feed pigmentation.

Apo-ester can provide a defined carotenoid pigment source for feed formulation, while Canthaxanthin offers a stronger red color contribution. Neither should be considered universally superior; the appropriate choice depends on the desired color profile, basal diet, poultry application, and commercial product specification.

For feed manufacturers, the most effective approach is to start with the target pigmentation , evaluate the existing dietary pigment contribution, and then select the appropriate pigment strategy.

ZEAPLANT's product portfolio likewise treats Canthaxanthin as a distinct pigment feed additive, reinforcing the importance of evaluating each pigment according to its own product characteristics rather than treating different carotenoids as interchangeable.

SEO Keywords

• β-apo-8'-carotenoic acid ethyl ester and Canthaxanthin
• Apo-ester vs Canthaxanthin
• Apo-ester poultry feed
• Canthaxanthin poultry feed
• poultry feed pigmentation
• poultry feed pigment
• Apo-ester feed additive