Feed Additives for Influencing Chicken Meat and Egg Yolk Color

Grashorn, M. A.

doi:10.1016/b978-0-08-100371-8.00014-2

Cited by 52 publications

(50 citation statements)

References 29 publications

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“…Skin color is crucial for the marketing of whole parts whereas meat color is important for the marketing of skinless cut up pieces (Fletcher, 2002). The chicken is the only poultry species in which pigmentation of products can be desired by consumers, although preferences vary by region and by culture (Grashorn, 2016). Some consumers can perceive the yellow color of chicken meat negatively because it is associated with an old bird or rancidity while others can consider it positively because it is associated with better health (Grashorn, 2016;Kennedy et al, 2002).…”

Section: Discussionmentioning

confidence: 99%

High-carotenoid biofortified maize is an alternative to color additives in poultry feed

Díaz-Gómez

Moreno

Angulo

et al. 2017

Animal Feed Science and Technology

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Skin color in poultry is achieved by the addition of natural or synthetic pigments to feed. Crops used routinely in feed formulations offer an alternative cost-effective strategy to replace color additives if they are biofortified with sufficient levels of carotenoids. We tested the hypothesis that high-carotenoid (HC) maize, which was genetically engineered to accumulate high levels of β-carotene, lutein and zeaxanthin in the endosperm, can replace carotenoid additives in poultry feed by performing two feeding trials using diets incorporating different maize lines with diverse carotenoid compositions: control (wild-type M37W, the parental line), HC, and standard yellow commercial maize supplemented with color additives (marigold flowers and red paprika extracts). The effects of dietary treatments on growth performance, health parameters, color evolution and carotenoid distribution were determined. We found that chickens fed on the HC diet grew normally and developed similar pigmentation to animals fed on a commercial diet supplemented with color additives, although yellowness was significantly higher in the commercial diet due to the high concentration of yellow xanthophylls. Lightness scores in chickens fed on the control, HC and commercial diets

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Section: Discussionmentioning

confidence: 99%

High-carotenoid biofortified maize is an alternative to color additives in poultry feed

Díaz-Gómez

Moreno

Angulo

et al. 2017

Animal Feed Science and Technology

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“…Raw egg yolks contained between 0.1 and 2.5 mg 100 g –1 fresh weight (FW) of lutein and from trace amounts to up to 1.3 µg 100 g –1 FW of zeaxanthin. The carotenoid content in the feed is commercially adjusted to obtain the desirable yolk color preferred by the final consumer …”

Section: Dietary Sources Of Carotenoidsmentioning

confidence: 99%

“…The carotenoid content in the feed is commercially adjusted to obtain the desirable yolk color preferred by the final consumer. 45 Another common source of carotenoids is bovine milk and its derived products. Ruminant feed is based on forages rich in -carotene and lutein, amongst other minor carotenoids such as zeaxanthin, antheraxanthin and violaxanthin.…”

Section: Animal Foodsmentioning

confidence: 99%

Bioaccessibility of carotenoids from plant and animal foods

2019

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The frequent consumption of carotenoid‐rich foods has been associated with numerous health benefits, such as the supply of provitamin A. To exert these health benefits, carotenoids need to be efficiently liberated from the food matrix, micellized in the small intestine, taken up by the enterocytes and absorbed into the human blood stream. Enormous efforts have been made to better understand these processes. Because human studies are costly, labor‐intense and time‐consuming, the evaluation of carotenoid liberation and micellization at the laboratory scale using simulated in vitro digestion models has proven to be an important tool for obtaining preliminary results prior to conducting human studies. In particular, the liberation from the food matrix and the intestinal micellization can be mimicked by simulated digestion, yielding an estimate of the so‐called bioaccessibility of a carotenoid. In the present review, we provide an overview of the carotenoid digestion process in vivo, the currently used in vitro digestion models and the outcomes of previous bioaccessibility studies, with a special focus on correlations with concomitantly conducted human studies. Furthermore, we advocate for the on‐going requirement of better standardized digestion protocols and, in addition, we provide suggestions for the complementation of the acquired knowledge and current nutritional recommendations. © 2018 Society of Chemical Industry

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“…Animal-based food sources of zeaxanthin are limited and fully dependent on the animal’s diet. For instance, by supplementing the feed of laying hens, the content of both lutein and zeaxanthin in egg yolk can be enhanced [ 69 , 70 , 71 ]. Due to the high-lipid matrix, xanthophylls from egg yolk, present in a lipid-dissolved form, are more bioavailable than from plant-based sources [ 72 ].…”

Section: Dietary Sources Of Zeaxanthinmentioning

confidence: 99%

A Brief Overview of Dietary Zeaxanthin Occurrence and Bioaccessibility

Tudor

Pintea

2020

Molecules

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As it exhibits no provitamin A activity, the dietary intake of zeaxanthin is not considered essential. However, its contribution to ocular health has long been acknowledged. Numerous publications emphasize the importance of zeaxanthin alongside lutein in ocular diseases such as cataracts and age-related macular degeneration which constitute an important health concern, especially among the elderly. Considering that the average dietary ratio of lutein to zeaxanthin favors the first, more bioaccessible food sources of zeaxanthin that can hinder the development and progression of the above-mentioned disorders are of great interest. In this paper, a brief overview of the more recent state of knowledge as regards dietary sources together with their respective zeaxanthin bioaccessibility assessed through a standardized in vitro digestion method was provided.

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Feed Additives for Influencing Chicken Meat and Egg Yolk Color

Cited by 52 publications

References 29 publications

High-carotenoid biofortified maize is an alternative to color additives in poultry feed

High-carotenoid biofortified maize is an alternative to color additives in poultry feed

Bioaccessibility of carotenoids from plant and animal foods

A Brief Overview of Dietary Zeaxanthin Occurrence and Bioaccessibility

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