How much iodine do you need?

The World Health Organisation recommendations are in the table.

Population group

World Health Organisation

Recommended Nutrient Intake (RNI)

(µg/day)

Children 0-5 years

90

Children 6-12 years

120

Adults >12 years

150

Pregnancy

250

Lactation

250

 

Download our iodine food fact sheet

Full facts on dietary sources of iodine can be found in our diet sheet.

This fact sheet is suitable for adults only (including pregnant women and breastfeeding women).

The fact sheet has been written by Dr Sarah Bath and Professor Margaret Rayman and can be downloaded from the British Dietetic Association

CEREBOS

Iodised salt in the UK

Most salt sold in the UK does not have iodine added (known as iodised salt). A survey in 2009 revealed that approximately just 20% of supermarket shoppers are able to access iodised salt.  

 

As there are recommendations to reduce salt intake in the UK, iodised table salt should not be used as a way of increasing iodine intake. Iodised salt is unlikely to contribute to iodine status in the UK. 

sources

Main dietary sources of iodine

Milk and dairy products are the main sources of iodine in the UK diet. However, organic milk has a lower (over 40%) iodine content than conventional milk. Winter milk has a higher iodine concentration than summer milk. 

 

Other sources include fish (white fish, oily fish and shellfish) and eggs. A table of iodine content of various foods can be found in our factsheet 

supplements

Iodine supplements

It is very important that kelp and seaweed supplements are not taken as an iodine source. 

Many multivitamin and mineral supplements contain iodine. Not all supplements for pregnant and lactating women contain iodine. 

More information on iodine in supplements can be found on our supplement page