Water filters are usually used to remove water from your body or to purify drinking water.
But a recent study has found that they can also cause cancer.
The study looked at the drinking water of more than 2,000 Californians and found that some of the filters they used were linked to cancer.
“Our research shows that these filters can cause cancer in animals, humans, and even in some of these filters themselves,” lead researcher Dr. John F. Oates said in a statement.
The researchers tested the drinking-water samples for DNA and found those in which they had tested positive for cancer had a lower cancer risk than those in the samples that had tested negative.
“These results suggest that there is a very real and pressing need for research into the possible carcinogenicity of water filters,” Oates wrote.
A report released by the American Lung Association on Tuesday found that water filters have a lower likelihood of causing cancer than the filters that the group uses to treat asthma.
The association said it wants to find out why some of its filters have lower cancer rates than others.
The filter makers told the group that some filters had a cancer risk that was “significantly lower” than for those without filters.
The American Lung Assoc.
said that the filters it tests are used to treat lung diseases like bronchitis, pneumonia and chronic obstructive pulmonary disease, but that those diseases also have a higher cancer risk.
The filters in question have been around for a long time and have been tested on humans for decades, according to the association.
But it said the filters may also be used to help treat people with diabetes, arthritis and other conditions.
“If you take a filter, there is no good way to clean it,” said Dr. David E. Schloss, an associate professor at the University of California at Davis School of Medicine.
“But it’s still possible to use a filter that has a higher chance of causing the cancer.”
A study published last year also found that people who use a water filter have higher rates of certain cancers.
It was published in the Journal of the American Medical Association.