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Skin pigmentation evaluation in broilers fed natural and synthetic pigments
M P Castañeda1, E M Hirschler, A R Sams
1Department of Poultry Science, Texas A&M University, College Station, Texas 77843-2472, USA.
Poultry Science
|February 3, 2005
Summary
Natural pigments in broiler feed more efficiently increase skin yellowness compared to synthetic pigments. This finding may allow for reduced pigment use and feed costs while maintaining consumer acceptance of broiler carcass color.
Area of Science:
- Animal Science
- Poultry Nutrition
- Food Science
Background:
- Broiler carcass skin color is a critical quality attribute for consumers in the United States and Mexico.
- Dietary pigments significantly influence broiler skin pigmentation.
Purpose of the Study:
- To evaluate the efficacy of natural versus synthetic pigments at varying dietary levels on broiler skin color.
- To simulate commercial feeding practices in the US and Mexico.
Main Methods:
- Broilers were fed diets containing natural or synthetic pigments at low and high inclusion levels.
- Skin color (b* for yellowness, a* for redness) was measured during live production (3-7 weeks) and post-slaughter.
- Blood pigment levels were analyzed at 7 weeks of age.
Main Results:
- Natural pigments resulted in higher skin yellowness (b*) than synthetic pigments.
- Higher pigment inclusion levels increased skin yellowness.
- Processing intensified skin yellowness and decreased redness.
- Synthetic pigment diets led to higher blood pigment levels, but natural pigments were more efficient for skin yellowness.
Conclusions:
- Natural pigments are more efficient for enhancing broiler skin yellowness than synthetic pigments.
- Optimal skin color can potentially be achieved with reduced pigment levels, lowering feed costs.
- These findings support informed pigment selection for desired broiler carcass appearance and economic efficiency.