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Is the Fiberglass in Your Attic or Walls Causing Cancer?

Is the Fiberglass in Your Attic or Walls Causing Cancer?

Story at-a-glance -

  • Fiberglass is one of the most widely used insulating materials in the world, despite concerns that it may cause cancer
  • The National Toxicology Program first ruled that fiberglass is “reasonably anticipated to be a human carcinogen,” then revised the ruling to include only certain glass wool fibers (those that are inhalable), which excludes fiberglass;
  • Consumer groups are challenging the revised label, claiming the formula the EPA and NIH used to determine carcinogenicity diluted the results, making them look like fiberglass is safe when it really isn’t
  • Animal studies have shown that certain glass fibers can cause tumors in animals’ lungs and other tissue sites, while cell studies have shown that certain fiberglass fibers may cause damage to DNA
  • When working with fiberglass, choose only formaldehyde-free varieties and wear protective clothing and a respirator; even better, opt for non-toxic insulation materials made from sheep’s wool, recycled blue jeans, newspapers or other natural materials

By Dr. Mercola

Fiberglass, also known as fibrous glass or glass wool, is a man-made fiber used to insulate homes, furnace filters, pipes, appliances and more; it’s also used for sound control in airplanes and automobiles, and in certain curtains, roofing material and plastics.


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