β-apo-8'-carotenoic acid ethyl ester Dosage in Poultry Feed: Key Factors to Consider

Determining the right β-apo-8'-carotenoic acid ethyl ester dosage is important when using Apo-ester as a poultry feed pigment. The appropriate inclusion level depends on the product concentration, feed type, target pigmentation, and applicable market requirements.

There is no single dosage that fits every Apo-ester product or every poultry feed formula.

What Is the Recommended Apo-ester Dosage?

For ZEAPLANT® YELLOW , the manufacturer's product page specifies an application range of:

5–250 g/T of poultry compound feed

This is the recommended product addition range for ZEAPLANT® YELLOW , not a universal dosage for pure β-apo-8'-carotenoic acid ethyl ester. The product contains a formulated pigment preparation with a stated maximum moisture content of 8% and a specified β-apo-8'-carotenoic acid ethyl ester content.

Therefore, feed manufacturers should calculate the actual pigment contribution based on the specification of the product being used.

Why Does the Dosage Vary?

Several factors can change the required inclusion level.

1. Product Concentration

Different commercial Apo-ester preparations can have different active-pigment concentrations.

A concentrated product and a diluted or formulated product cannot be compared simply by their addition rate in grams per tonne.

2. Target Color

The required level depends on the desired pigmentation result.

For example, a feed manufacturer may have a specific target for:

• Egg yolk color
• Broiler skin pigmentation
• Overall yellow-orange pigmentation

A stronger pigmentation target may require a different feeding strategy than a basic color-maintenance program.

3. Existing Pigments in the Feed

The basal diet may already contain carotenoids from ingredients or other pigment additives.

The Apo-ester dosage should therefore be considered as part of the total pigment contribution of the feed , rather than as an isolated number.

4. Poultry Type

Layer and broiler feeds have different pigmentation objectives.

For laying hens, the focus is often related to yolk color. For broilers, pigmentation may relate more to skin and shank appearance.

The intended application should therefore be defined before selecting an inclusion level.

Should You Simply Use the Highest Dosage?

No.

A higher addition rate does not automatically mean a better or more desirable result.

Using an unnecessarily high inclusion level can increase formulation costs without providing a proportional improvement in the target color.

A more practical approach is:

Target color → Check existing pigments → Calculate product inclusion → Evaluate the result → Adjust if necessary

How Does Product Form Affect Application?

Apo-ester products are often formulated to improve handling and distribution in feed.

ZEAPLANT® YELLOW is supplied as free-flowing purple-red granules . Its product page specifies that 100% passes through an 840 μm sieve, with up to 20% passing through a 150 μm sieve. The product also uses a double-enveloped structure designed to support stability and absorption.

These physical characteristics are relevant when incorporating a concentrated pigment into poultry feed or premixes.

What About Regulatory Dosage Limits?

Regulatory limits are not the same thing as a manufacturer's recommended product addition rate .

For example, EFSA has evaluated specific dietary concentrations of β-apo-8'-carotenoic acid ethyl ester for poultry under defined conditions. Its assessment should be considered separately from the commercial application range of a particular formulated product.

Feed manufacturers should always check the regulations applicable to the destination market before establishing the final formulation.

A Practical Way to Determine the Dosage

For a new poultry feed formulation, a simple evaluation process is useful:

1. Identify the Apo-ester product concentration.
2. Check the existing carotenoid sources in the feed.
3. Define the desired pigmentation target.
4. Calculate the initial product inclusion rate.
5. Produce a trial batch.
6. Evaluate the actual pigmentation result.
7. Adjust the formulation based on production data.

This approach is more reliable than copying a dosage from another commercial product.

Key Takeaway

The correct β-apo-8'-carotenoic acid ethyl ester dosage depends on the concentration of the commercial product and the pigmentation objective of the poultry feed.

For ZEAPLANT® YELLOW , the listed application range is 5–250 g/T of poultry compound feed . However, this range should not be treated as a universal dosage for every Apo-ester product.

For commercial feed production, the best dosage is the one that matches the product specification, feed composition, target pigmentation, and applicable regulations .