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The effect of carotenoid polarity on absorption and pigmentation in laying hens was measured by a 6-week feeding trial using 50–300mg carotenoids/kg feed. The order of carotenoid polarity used in this study was β-8-apo-carotenoic acid ethyl ester (ACAEE) > canthaxanthin> β-carotene. ACAEE and canthaxanthin were absorbed 9–11- and 3–5-fold more into the blood than β-carotene. Translocation of...
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