Supplemental microalgal astaxanthin produced coordinated changes in intrinsic antioxidant systems of layer hens exposed to heat stress

A. Magnuson,T. Sun,R. Yin,Guanchen Liu,S. Tolba,S. Shinde,X. Lei

Published 2018 in Algal Research

ABSTRACT

Abstract Astaxanthin is a well-known antioxidant phytochemical that has limited bioavailability to humans. The present study was conducted to determine if microalgal astaxanthin was bioavailable to layer hens and affected antioxidant status of their tissues and eggs. A total of 50 White Leghorn Shavers (21-wk old) were divided into 5 groups (n = 10/group), caged individually in an environmentally-controlled room, and fed a corn-soybean meal basal diet supplemented with microalgal (Haematococcus pluvialis) astaxanthin (Heliae, Gibert, AZ) at 0, 10, 20, 40, and 80 mg/kg for 6 wk. Heat stress was induced during weeks 4–6 when the ambient temperature was raised 3 °C above the optimal temperature. Supplemental microalgal astaxanthin resulted in dose-dependent enrichments (P

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