title: Bioavailability of lutein in corn distillers dried grains with solubles relative to lutein in corn gluten meal based on lutein retention in egg yolk.
abstract: BACKGROUND
  Dietary lutein and its food sources have gained great attention due to its health-promoting effects on humans, especially for certain eye diseases. However, relative bioavailability (RBV) of lutein among lutein-rich feed ingredients that lead to lutein-enriched egg production has not been determined. Thus, the RBV of lutein in corn distillers dried grains with solubles (DDGS) as compared to lutein in corn gluten meal (CGM) was evaluated based on lutein retention in egg yolk.
  
  
  RESULTS
  Increasing inclusion levels of DDGS or CGM in diets increased (linear, P < 0.01) Roche colour score and lutein concentrations of egg yolk without affecting laying performance. Multiple regression analysis revealed that the bioavailability of lutein in DDGS was less (P < 0.05) than that of lutein in CGM, with the RBV of lutein in DDGS being 61.6% when the bioavailability of lutein in CGM was assumed to be 100% for lutein retention in egg yolk.
  
  
  CONCLUSIONS
  The results of the present experiment indicate that the DDGS can be a potential ingredient for laying hens to improve egg yolk colour and lutein concentrations of egg yolk although lutein in DDGS is less bioavailable than lutein in CGM. © 2015 Society of Chemical Industry.
authors.affiliation: Department of Animal Science and Technology, Chung-Ang University, Anseong-si, Gyeonggi-do, 456-756, Republic of Korea.
authors.forename: Hye Seong
authors.initials: HS
authors.lastname: Shin
authors.affiliation: Department of Animal Science and Technology, Chung-Ang University, Anseong-si, Gyeonggi-do, 456-756, Republic of Korea.
authors.forename: Jong Woong
authors.initials: JW
authors.lastname: Kim
authors.affiliation: Department of Integrative Plant Science, Chung-Ang University, Anseong-si, Gyeonggi-do, 456-756, Republic of Korea.
authors.forename: Dong Gu
authors.initials: DG
authors.lastname: Lee
authors.affiliation: Department of Integrative Plant Science, Chung-Ang University, Anseong-si, Gyeonggi-do, 456-756, Republic of Korea.
authors.forename: Sanghyun
authors.initials: S
authors.lastname: Lee
authors.affiliation: Department of Animal Science and Technology, Chung-Ang University, Anseong-si, Gyeonggi-do, 456-756, Republic of Korea.
authors.forename: Dong Yong
authors.initials: DY
authors.lastname: Kil
mesh_terms: D000821:Animal Feed; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D001682:Biological Availability; D002645:Chickens; D004032:Diet / Q000662:veterinary; D002523:Edible Grain / Q000737:chemistry*; D004530:Egg Yolk / Q000737:chemistry / Q000378:metabolism*; D005260:Female; D005983:Glutens / Q000737:chemistry; D006293:Health Promotion; D006801:Humans; D014975:Lutein / Q000008:administration & dosage / Q000032:analysis / Q000493:pharmacokinetics*; D010058:Oviposition / Q000187:drug effects; D003313:Zea mays / Q000737:chemistry*
chemical_list: D005983:Glutens; D014975:Lutein
keywords: corn distillers dried grains with solubles; corn gluten meal; egg yolk; laying hen; lutein; relative bioavailability