This paper found that when giving turkeys extremely high doses of vitamin A and normal doses of vitamin D the turkeys had symptoms of hypervitaminosis A, vitamin A toxicity.

这篇论文发现，当给予火鸡大剂量的维生素 A 和正常量的维生素 D 时，火鸡会出现维生素 A 过多症、维生素 A 中毒。