Low thyroid hormone in 16 weeks of pregnancy can eat non-iodized salt. Thyroid hormone is low at 16 weeks of pregnancy, if it is not accompanied by elevated thyroid hormone, it is considered subclinical hyperthyroidism, if it is accompanied by elevated thyroid hormone, it is considered hyperthyroidism; in the choice of salt, try to take non-iodized salt as the main, because iodine is the raw material for the synthesis of thyroid hormone, and if too much iodine is ingested, it may lead to exacerbation of the condition. It is important to note that thyroid hormone abnormalities during pregnancy should be reviewed regularly and treated with medication if necessary to maintain thyroid hormone levels within a reasonable range, so as to avoid miscarriages and fetal malformations caused by abnormal thyroid hormone levels. Patients with low thyroid hormone levels at 16 weeks of pregnancy are advised to seek medical advice from a medical professional.