β-apo-8'-carotenoic acid ethyl ester in Poultry Feed: What Determines the Final Pigment Intake?
When using β-apo-8'-carotenoic acid ethyl ester in poultry feed, the amount added to the feed formula is not necessarily the same as the amount ultimately consumed by each bird.
For feed manufacturers, understanding this difference can help when evaluating pigment programs and production results.
1. Inclusion Rate Is Only the Starting Point
The first factor is the amount of Apo-ester added to the feed.
ZEAPLANT® YELLOW is specified for poultry compound feed , with a stated usage range of 5–250 g/T . The appropriate inclusion level depends on the specific feed formulation and production objective.
However, the calculated amount in the formula does not represent the actual intake of every bird.
2. Feed Intake Determines Actual Exposure
If birds consume different amounts of feed, their daily intake of the pigment will also differ.
For example, two birds receiving the same feed concentration may consume different quantities of feed. Their total daily pigment intake will therefore not necessarily be identical.
This is why pigment concentration and animal feed intake should be considered separately.
3. Feed Formulation Can Change Intake
The complete feed formula can influence how much feed birds consume.
Changes in energy density, ingredient composition, feed form, or other nutritional factors may affect feed intake.
Therefore, when comparing two pigment programs, manufacturers should avoid assuming that the same Apo-ester concentration automatically means the same daily pigment intake.
4. Feed Form Also Matters
Poultry feed may be produced in different physical forms, such as mash or pellets.
Differences in feed form can affect feeding behavior and overall feed consumption. For this reason, the feed format should remain consistent when manufacturers are comparing pigment programs.
5. Production Stage Should Be Considered
Feed intake can change according to the production stage of the birds.
A pigment program evaluated during one stage should therefore not automatically be compared with results from a substantially different production stage without considering changes in feed consumption.
This is particularly relevant when evaluating longer-term layer production programs.
6. Product Characteristics Are Also Relevant
The commercial form of the pigment can influence how it is incorporated into the feed.
ZEAPLANT® YELLOW is described as a free-flowing purple-red granule and features a special double-enveloped structure. The manufacturer also describes the product as having high bioavailability and a stable, uniform coloring effect.
These are product characteristics to consider when establishing a feed pigmentation program.
A Simple Way to Think About Pigment Intake
For feed manufacturers, the relationship can be summarized as:
Pigment concentration in feed × feed consumed = estimated dietary pigment intake
This simple calculation is useful because it separates the formulation specification from actual feed consumption.
The estimated value can then be considered together with the production stage and feeding conditions.
What Should Feed Manufacturers Record?
When evaluating an Apo-ester program, useful records can include:
- Apo-ester inclusion rate
- Feed consumption
- Feed formulation
- Feed form
- Production stage
- Pigmentation result
Keeping these variables together provides a clearer picture than looking at the pigment inclusion rate alone.
Conclusion
The final β-apo-8'-carotenoic acid ethyl ester intake in poultry is determined by more than the amount specified in the feed formula.
Inclusion rate, actual feed consumption, feed formulation, feed form, and production stage can all influence the amount of pigment consumed by the birds.
ZEAPLANT® YELLOW is specified for poultry compound feed at 5–250 g/T , providing a product reference for feed formulation. Actual pigment intake should then be considered in the context of the birds' real feeding conditions.