Effect of supplementing the hen's diet with vitamin A on the accumulation of vitamins A and E, ascorbic acid and carotenoids in the egg yolk and in the embryonic liver

acide ascorbique acido ascorbico ascorbic acid aves de corral carotenoide carotenoides carotenoids chicks diet dieta egg yolk exceso de nutrientes females femelle foie hembra jaune d'oeuf liver nutrient excesses pollito poultry poussin retinol suplementos supplements vitaminas vitamine vitamins volaille yema de huevo