Problems of a high content of vitamin A in the liver of calves, cattle, sheep and pigs for the human nutrition. Amount of the storage and teratogenic mechanism of action (review)

alimentation des animaux alimentation humaine animal embryos animal feeding bovin calves cattle cerdo embriones animales embryon animal foie ganado bovino human feeding liver ovin ovinos porcin retinol sheep swine teratogenos teratogens ternero toxicidad toxicity veau