To clarify the influence of iodine intake in salt on the incidence and treatment of hyperthyroidism patients, so as to provide theoretical basis for accurate formulation of iodine intake in salt, and provide strategies for effective prevention and control of hyperthyroidism.

Inclusion Criteria:

1. sign informed consent before any research procedure is carried out
2. men or women aged 18-65 (equal) at the age of 1.
3. had been diagnosed as Graves hyperthyroidism
4. patients with hyperthyroidism who had not been treated with drugs or stopped taking medicine for more than 3 months
5. reduction to the current dose of hyperthyroidism for more than 2 months

Exclusion Criteria:

1. during the period of pregnancy and lactation, those who plan to be pregnant during the study are not granted medical permission.

   Effective contraceptives

2. for the last 1 months or the need for long-term use of amiodarone

3. the history of anaphylaxis (such as systemic anaphylaxis, vasoedema, epidermal exfoliation) Etc.)

4. consecutive use of beta receptor blockers for the last 2 weeks

5. over the past six months, systemic use of corticosteroids (oral or intravenous) is continuous More than 7 days

6. there was an obvious liver disease, showing one of the following cases: two consecutive weeks before A. visits.

It was confirmed that the measurements of AST or ALT were more than 3 times higher than the highest normal value (local data).

B. bilirubin synthesis and / or excretion disorders (such as hyperbilirubinemia), and other Decompensated liver diseases such as coagulation disorders, hepatic encephalopathy, hypoproteinemia, ascites, and esophagus Bleeding from varicose veins. C. acute viral, active, alcoholic, and alcoholic Other types of hepatitis 7 visits for 4 weeks before the 1 (or the local data), leukopenia (less than 3 * 10 9 /L) B/ 0 edition of the First Affiliated Hospital of The Fourth Military Medical University The First Affiliated Hospital, the Fourth Military Medical University B/0 Edition Seventh pages / 13 Pages Or neutropenia (less than 1.5 * 10 9 /L) 8 congestive heart failure at grade III or IV of the New York Heart Association (NYHA) 9 the past 3 months of visit to 1 had a major cardiovascular history, defined as: myocardial infarction Plug and coronary angioplasty or bypass surgery, valvular disease or repair, instability Angina pectoris, transient ischemic attack, or cerebrovascular accident 10 non well controlled atrial fibrillation 11 diagnosis of malignant tumors over the past 5 years 12 history of medullary thyroid carcinoma 13 organ transplantation or AIDS history 14 severe exophthalmos has influenced visual acuity 15 over the last 12 months, there is a history of alcohol abuse or drug abuse