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Effects of quercetin, vitamin E, and quercetin + vitamin E on the very low density lipoprotein (VLDLy) and vitellogenin (VTG) levels in the liver, serum, and ovary of the aging breeder hens. prot: protein. Levels of VLDLy (A–C) and VTG (D–F). The values are presented as the mean ± SD. Bars without the same letter differed significantly (p < 0.05). prot: protein.
