Salt
The amount of iodine and the specific iodine compound added to salt varies from country to country. In the United States, the Food and Drug Administration (FDA) recommends [21 CFR 101.9 (c)(8)(iv)] 150 micrograms of iodine per day for both men and women. US iodized salt contains 46–77 ppm (parts per million), whereas in the UK the iodine content of iodized salt is recommended to be 10–22 ppm.
Creswell Eastman
His preferred method of delivery for pregnant and lactating women is via oral iodine supplements. In his day to day practice at the Sydney Thyroid Clinic he will give priority to pregnant women. Eastman's work in China indicates that adequate iodine intake has resulted in an overall increase in the national IQ. He is of the opinion that recent testing of children in Australia that showed a decline in results in Australian children may be caused by iodine deficiency. This was a problem that he previously flagged in 2007: "If we don't address this in Australia then we are likely to see a lot of children born in coming years that have lower IQs, have problems with hearing, have great learning difficulties and they are less likely to fulfill their genetic potential."Eastman is married to Annette, whom he met while a medical student, and has four children Katherine (Kate), born 1966; Damien, born 1968; Phillipa, born 1970 and Nicholas, born 1974.