US rice imports 'contain harmful levels of lead'

Analysis of commercially available rice imported into the US has revealed it contains levels of lead far higher than regulations suggest are safe.

Some samples exceeded the "provisional total tolerable intake" (PTTI) set by the US Food and Drug Administration (FDA) by a factor of 120.

The report at the American Chemical Society Meeting adds to the already well-known issue of arsenic in rice.

The FDA told the BBC it would review the research.

Lead is known to be harmful to many organs and the central nervous system.

It is a particular risk for young children, who suffer significant developmental problems if exposed to elevated lead levels.

Because rice is grown in heavily irrigated conditions, it is more susceptible than other staple crops to environmental pollutants in irrigation water.

Recent studies have highlighted the presence of arsenic in rice - prompting consumption advice from the UK's Food Standards Agency and more recently from the FDA.