Keep your metabolism revved up
Iodine is a nutrient that helps to maintain the normal function of the thyroid gland and the production of the thyroid hormones*. These hormones in turn help to regulate the body’s metabolism. When the thyroid gland produces insufficient thyroid hormones, a condition called hypothyroidism (also known as an underactive thyroid) can result, causing symptoms such as weight gain and tiredness**. Although a lack of iodine in the diet is rarely the cause of an underactive thyroid in developed countries, figures from the National Diet and Nutrition Survey show that eight percent of adults have extremely low iodine intakes.
Good news then that eating more fish can help to boost intakes. In particular, cod, coley, crab, crayfish, haddock, langoustine, lobster, mussels, oysters, sardines, squid and whiting, are all packed with this nutrient.
* EFSA Journal 2010; 8 (10): 1800. doi: 10.2903/j.efsa.2010.1800
** NHS Choices. Underactive thyroid (Hypothyroidism).