by EBSCO Medical Review Board

It will take time for your thyroid hormone replacement to help your thyroid function become normal. You will need to have blood tests until this happens.

Talk to your doctor before taking any supplements that contain iodine, such as kelp.


Hypothyroidism (underactive thyroid). National Institute of Diabetes and Digestive and Kidney Diseases website. Available at: Updated August 2016. Accessed May 20, 2019.

Hypothyroidism in adults. EBSCO DynaMed website. Available at: . Updated July 20, 2018. Accessed May 20, 2019.

Jonklaas J, Bianco AC, Bauer AJ, et al. Guidelines for the treatment of hypothyroidism. Thyroid. 2014 Dec;24(12):1670-751.

Revision Information

  • Reviewer: EBSCO Medical Review BoardJames P. Cornell, MD
  • Review Date: 03/2019
  • Update Date: 05/20/2019