Japan slapped restrictions on some food produced in two provinces around the Fukushima Daiichi nuclear power plant Sunday after high levels of radioactivity turned up in spinach and milk.
However, Dr. James Cox, professor of radiation oncology at the M.D. Anderson Cancer Center in Houston, said the reported levels posed little or no health concerns.
"The immediate risk in terms of health effects are probably nonexistent, and the long-term risk is very low," said Cox, a CNN consultant.
Nonetheless, the Japanese government has banned the sale of raw milk from Fukushima Prefecture, where the Fukushima Daiichi plant is located, and prohibited the sale of spinach from neighboring Ibaraki Prefecture after finding levels of radioactive iodine and cesium higher than government standards, the country's Health Ministry reported. And officials in Fukushima halted the distribution of locally grown vegetables outside the prefecture.