Why would my thyroid be enlarged?

Possible Reasons for Thyroid Enlargement

One of the primary reasons for the enlargement of the thyroid gland, commonly referred to as a goiter, is a deficiency of iodine. This essential mineral is crucial for the synthesis of thyroid hormones. When dietary iodine levels are insufficient, the thyroid gland compensates by increasing in size in an effort to absorb more iodine, allowing it to produce adequate amounts of thyroid hormones.