Is onion and tomato not good for hyperthyroid?

Onion and tomato are generally not considered to be harmful for people with hyperthyroidism. In fact, some studies have even suggested that certain compounds found in onions and tomatoes may have beneficial effects on thyroid function. For example, quercetin, a flavonoid found in onions, has been shown to inhibit the activity of thyroid peroxidase, an enzyme involved in the production of thyroid hormones. Additionally, tomatoes are a good source of iodine, a mineral that is essential for thyroid function. However, it is important to note that some people with hyperthyroidism may experience an increase in symptoms after consuming onions or tomatoes. If you have hyperthyroidism and are concerned about the effects of these vegetables, it is best to talk to your doctor or a registered dietitian.