Results of the BfR MEAL Study: Highest levels of retinol found in animal livers and of β-carotene in yellow-orange and green leafy vegetables

德国联邦风险评估研究所 (BfR) 的膳食研究结果显示：动物肝脏中视黄醇含量最高，而黄橙色和绿色叶类蔬菜中β-胡萝卜素含量最高。