在扎伊尔已有一百多万人注射了碘油。已证明一次注射可使甲状腺功能正常并预防甲状腺肿和克汀病至少五年。在部分地区,地方性甲状腺肿及克汀病与缺碘及以木薯为主食有关。世界上有数亿人以木薯为主食。该次研究始于15年之前,当时Delange More than one million people have injected iodized oil in Zaire. A single injection has been shown to normalize thyroid function and prevent goiter and cretinism for at least five years. In some areas, endemic goiter and cretinism are associated with iodine deficiency and cassava as the staple food. Hundreds of millions of people in the world use cassava as the staple food. The study began 15 years ago when Delange