期刊
JOURNAL OF ENDOCRINOLOGICAL INVESTIGATION
卷 44, 期 9, 页码 1827-1835出版社
SPRINGER
DOI: 10.1007/s40618-021-01548-x
关键词
Iodine; Thyroid autoimmunity; Iodine deficiency; Iodine supplementation; Hypothyroidism
Despite some concerns, studies have shown that iodine supplementation does not have significant negative effects on thyroid autoimmunity or related dysfunction. Thus, promoting iodine supplementation in the general population is considered to be safe and beneficial.
Iodine deficiency is still the main cause of preventable thyroid disorders, worldwide. To optimize iodine intake, programs of voluntary or mandatory iodization of salt have been implemented in several iodine-deficient countries and iodine sufficiency has been achieved in many. Despite the clear beneficial effects on thyroid health, some concerns have been raised on the presumed detriment of iodine prophylaxis on thyroid autoimmunity. Very recent studies aimed at evaluating the long-term consequences of iodine supplementation on thyroid autoimmunity and related dysfunction, have clearly demonstrated that the early post-iodization increase in thyroid antibody positivity is largely transient and not clinically relevant, since the prevalence of overt thyroid dysfunction has remained reassuring low over two decades. The recommended iodine intake is therefore safe with regard to thyroid autoimmunity, the benefits largely outweighing the risks in a population with a stable median iodine concentration not exceeding 300 mu g/L. Thus, a possible increase in thyroid autoimmunity should not represent a limitation to promoting iodine supplementation in the general population, also taking into account the steady rise in prevalence of autoimmune disorders which has occurred in the last few decades because of environmental factors other than iodine.
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