Health Highlights: Oct. 31, 2008

Nov. 1 -- Here are some of the latest health and medical news developments, compiled by editors of HealthDay:

Consumer Group Questions Safety of Nanoparticles in Sunscreens

Four out of five mineral-based sunscreens that claim not to contain nanoparticles actually do contain them, says a report released Friday by Consumers Union, publisher of Consumer Reports.

The organization urged the U.S. Food and Drug Administration to conduct a full-scale safety review of nanoparticles in sunscreens.

"The widespread use of nanoparticles of titanium dioxide and zinc oxide in sunscreen is involving consumers in a vast experiment as to the safety of these products," Michael Hansen, a senior scientist at Consumers Union, said in a news release.

"These very tiny nano-sized particles are known to have different properties than the conventional versions of these chemicals and could be harmful to health. The FDA should require safety data for all these nanoparticles, and at the very least, they should require companies to be truthful about whether or not they are using nano-ingredients," Hansen said.

According to Consumers Union, the four sunscreens that claimed not to contain nanoparticles, but did contain them, were: Aubrey Organics Natural Sun SPF 25 Green Tea Protective Sunscreen; Badger SPF 30 Sunscreen; Kiss My Face SPF 30+ Sun Screen with oat protein complex; and Mexitan SPF 30 Sunscreen. Zinka Colored Nosecoat was the only one of the five that contained no nanoparticles, the group said.

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China Widens Melamine Investigation

The investigation into melamine-contaminated food in China is being widened, Chinese officials said Friday as there was more evidence that the toxic industrial chemical is widespread in the nation's animal feed supplies.

Earlier this week, food safety tests showed the eggs produced in three different provinces were contaminated with melamine, which has been blamed for causing kidney stones and renal failure in infants who consumed milk products tainted with the chemical. The egg test results triggered recalls and consumer warnings, The New York Times reported.