五十年代在芬兰东部发现存在中等程度的地甲肿,而实际上整个芬兰都处于中度的碘缺乏状态。对东部地区人群每日食物碘摄入量和尿碘的排出量进行测定,发现尿碘的排泄量是50—70μg/天,碘的主要来源是乳制品、约占总摄入量的50%,碘盐可供利用,但从碘盐中可摄取的碘很少,约占总摄入量的20%。从五十年代开始实行碘预防 In the fifties, there was a modest degree of gyomatosis found in eastern Finland, and virtually all of Finland was in a state of moderate iodine deficiency. The daily iodine intake and urinary iodine output of the population in the eastern region were measured and found that urinary iodine excretion was 50-70μg / day, the main source of iodine is dairy products, accounting for about 50% of the total intake , Iodized salt is available, but few iodine salts are ingested, accounting for about 20% of the total intake. Iodine prevention started in the 1950s