2019年2月27日，据欧盟食品安全局（EFSA）消息，应欧盟委员会要求，欧盟动物饲料添加剂和产品（FEEDAP）研究小组被要求就二水钼酸钠（sodium molybdate dihydrate）作为绵羊饲料添加剂的安全性和有效性发表科学意见。
经过评估，FEEDAP小组得出的结论是，在绵羊全价饲料中铜与钼的最佳比例为3 - 10，铜含量最高为15mg/Kg，2.5 mg total Mo/kg全价饲料对绵羊来说是安全的。铜与钼的比例为3 - 10时，补充钼被认为是有效的。
部分原文报道如下：
Following a request from the European Commission, the Panel on Additives and Products or Substances used in Animal Feed （FEEDAP） was asked to deliver a scientific opinion on safety and efficacy of sodium molybdate dihydrate for sheep, based on a dossier submitted for the re‐evaluation of the additive. The additive is currently authorised in the EU for all animal species as 'Nutritional additive' - 'Compounds of trace elements‘。 Taking the optimal Cu:Mo ratio of 3-10, and the highest total copper level authorised in complete feeds for sheep （15 mg/kg）， the FEEDAP Panel concluded that 2.5 mg total Mo/kg complete feed is safe for sheep. Considering （i） a safe intake of 0.6 mg Mo/day, （ii） the estimate average intake figure from food in Europe （generally less than 100 μg/day）， （iii） the contribution of foods of animal origin to the total molybdenum intake （estimated to be up to 22 %）， and （iv） that molybdenum would not accumulate in edible tissues/products of sheep fed molybdenum supplemented diets up to the upper safe level, the FEEDAP Panel concluded that the use of sodium molybdate as a additive in sheep at 2.5 mg total Mo/kg complete feed is safe for consumers.
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