Iodine

Definition

Iodine is an element essential to the synthesis and normal function of thyroid hormones in the body.

Health considerations

Iodine deficiency is a cause of hypothyroidism, in which thyroid function is insufficient. Symptoms include fatigue, goitre, depression, weight gain, and a low basal temperature. Excessive iodine consumption is a risk factor for hyperthyroidism (overly sufficient thyroid function), typically if done quickly after a state of iodine deficiency.

Keep in mind

Households which do not use iodized table salt and/or avoid dairy and/or fish should be aware of these items’ status as a significant source of iodine.

May be found in

Iodized table salt, dairy products, sea vegetables, seaweed, eggs, white fish, shellfish, oily fish

References

unicef
Medline Plus
The Association of UK Dietitians