Researchers at the University of Nevada Las Vegas recently found worryingly high levels of lead in four Mexican salsa brands that are available in some parts of the U.S.

That bottle of hot sauce may be doing more than setting your tongue ablaze. Four out of 25 bottles of hot sauce from Mexico and South America, or 16 percent, tested by researchers at the University of Nevada in Las Vegas contained high levels of lead.

A report last week that more than half of samples of brand-name canned tuna contained more mercury than deemed safe by the U.S. Environmental Protection Agency (EPA) raised concern among tuna lovers everywhere.

More than half of canned tuna samples from a local grocery store failed to meet the strict Environmental Protection Agency safety level for mercury in fish, according to a new study by University of Nevada, Las Vegas researchers.