Chemical Symbol



Iodine is an essential trace element found in our bodies. It can be found mostly within the thyroid gland and during the synthesis of thyroid hormones, which help to regulate growth, development, metabolism and reproduction in the body.


Iodine is a component of thyroid hormones, these hormones help to regulate our body temperature, metabolic rate, reproduction and growth. Iodine also contributes to controlling the rate at which cells use oxygen and energy.

Forms Available

Recommended Intake


  • Up to 6 months: 110 micrograms per day (mcg/day)
  • 7 to 12 months: 130 mcg/day



  • 1 to 3 years old: 90 mcg/day
  • 4 to 8 years old: 90 mcg/day
  • 9 to 13 years old: 120 mcg/day


Adolescents and Adults

  • Males 14 years old and older: 150 mcg/day
  • Females 14 years old and older: 150 mcg/day
  • Women who are pregnant or may become pregnant need at least 150 mcg/day
  • Lactating women need at least 150 mcg/day


Intake values depend on age, gender, overall health, and other medical conditions.  Proper consultation should be done to ensure the correct daily value.


Iodine deficiency leads to hypothyroidism, goiter and cretinism. When the body exhausts the amount of iodine in the body it becomes influenced by the pituitary gland to increase its activity, becoming enlarged or causing goiter. Some secondary symptoms of hyperthyroidism are fatigue, apathy, drowsiness, lethargy, muscle weakness, weight gain and coarse skin. Cretinism is a birth defect that happens in infants when a mother’s diet during pregnancy is severely deficient in iodine. It causes major intellectual impairments in children and is irreversible.

Sources in the Diet

Good sources of iodine come from vegetables grown in iodine rich soil, kelp, onions, milk and saltwater fish or seafood.

Recent Studies and Articles

The Importance of iodine

What you need to known about iodine

How to get more iodine in the diet

Challenges Presented

Watson Products


  1. [0] –
  2. [] – 1. Hendler S., Rorvik D., Fleming T.,et al. Physicians’ Desk Reference for Nutritional Supplements. Montvale, NJ: Medical Economics Company, Inc.; 2001.
  3. [] – 2. Reavley N. The New Encyclopedia of Vitamins, Minerals, Supplements and Herbs. New York, NY: M. Evans and Company, Inc.; 1998.
  4. [] – 3. Nelms, M. Sucher, K. Lacey, K. Roth, S. Nutrition Therapy & Pathophysiology. 2 ed. New York, NY: Cengage Learning; 2011.
  5. [] – 4. Higdon J., Drake V., An Evidence-based Approach to Vitamins and Minerals. New York, NY: Thieme Publishing Group.; 2012
  6. [] – 5. Boyle, Marie A. and Anderson Sara L. Personal Nutrition. 7th ed. Belmont, CA: Wadsworth/Thomson Learning; 2007.
  7. [] – 7. Dole Nutrition Institute. The Dole Nutrition Handbook. Printed in the United States of America; Rodale Inc. 2010.
  8. [0] –