Tobacco companies have deliberately ignored startling tobacco cancer risks since 1959, according to newly released internal documents, UCLA researchers say.

A study published on Sept. 27 in the journal Nicotine & Tobacco Research claims tobacco companies also refused to implement suggested methods to decrease these risks.

In addition to the findings, which add to a body of research suggesting tobacco companies have knowingly ignored cancer risks, the study further shows tobacco should be termed as a radioactive product, said lead author Hrayr Karagueuzian.

Scientists used to believe chemicals cause carcinogenic substances in tobacco smoke. But a chemical in tobacco releases insoluble alpha particles, which have been proven to accumulate in lungs, said Karagueuzian, a professor of cardiology with UCLA’s Cardiovascular Research Laboratory. These radioactive particles form hot spots and malignant growths.

Karagueuzian said he hopes the study will prompt the Food and Drug Administration to put tobacco regulation at the top of its priority list. He also said he hopes tobacco companies comply with FDA regulations.

The Family Smoking Prevention and Tobacco Control Act passed in 2009 allows the FDA to request removal of any damaging substances in tobacco, except nicotine.

But whether the FDA has the will, resources or budget to do so is another matter, Karagueuzian said.