Thyroid gland produces thyroxine and triiodothyronine. Thyroxine has four iodine atoms, while triiodothyronine has three iodine atoms. The dietary iodine serves as source and thus iodine deficient diet renders the gland unable to synthesize the hormones. Thyroid hormones deficiency inhibits metabolic rate, growth and development.
A person might suffer from goitre in case of iodine deficiency in the body.