Carrot leaves improve color and xanthophyll content of egg yolk in laying hens but are not as effective as commercially available marigold fortificant

摘要: ABSTRACT Yellow and orange egg yolks are good sources of xanthophyll carotenoids, consumption which is associated with health benefits, such as cancer prevention, eye health, bone health. Industrial feed fortificants used to improve yolk color carotenoid concentration typically derived from marigold flowers. Green leafy vegetables also concentrated the xanthophylls lutein zeaxanthin (L+Z), but they have not been rigorously evaluated in laying hen feeds a colorant. The addition food manufacturing byproducts, including carrot leaves, animal promoted method improving nutrition. ability dehydrated leaves L+Z was by feeding hens (n = 40) white maize-based fortified 2 different positive control, or no fortificant negative control for 28 D. After 7-D washout period, were separated into 4 groups, eggs collected every other day. Yolks analyzed using portable colorimeter define space ultra-performance liquid chromatography determine profile. Carotenoid rapidly declined day 0 8, confirming adequate conditions. maize (WM) (3.59 ± 0.51 nmol/g) significantly less than orange-carrot leaf-treated (OCL) (5.34 0.36 red-carrot (RCL) (5.92 1.00 marigold-treated (MG). However, MG higher both groups. From 8 (3.93 0.74 (9.32 1.66 nmol/g), had largest increase only treatment surpass initial concentrations (8.50 1.64 nmol/g). A similar trend observed reflected space.