牲畜补碘主要取决于他们的习性,与海洋的距离以及它们的食物和它们对致甲状腺肿物质的摄取。在德国曾经以进口鱼粉来保证农场牲畜足够的碘供应。这一惯例被取消以后在德国的New Lands(原东德)发现农场牲畜有广泛缺碘的迹象,而且这一现象由于用植物蛋白取代鱼蛋白而加剧。例如油菜籽含有极少 The iodine supplementation of livestock depends largely on their habits, their distance from the oceans and their food and their intake of goitre. In Germany, imported fishmeal was once used to ensure sufficient iodine supply to farm animals. After this convention was abolished, there was evidence of widespread iodine deficiency in farm animals in New Lands, Germany, and this phenomenon was exacerbated by the replacement of fish protein with plant protein. For example rapeseed contains very little