LEICESTER , England, June 18 (UPI) -- Researchers in Britain say marijuana damages DNA in ways that could potentially increase the risk of cancer development in humans.
NEW YORK, April 24 (UPI) -- A panel of U.S. and Canadian researchers says smoking and exposure to secondhand smoke may increase the risk of breast cancer.
OTTAWA, Dec. 20 (UPI) -- A Canadian report says marijuana smoke contains more toxic compounds, including ammonia and hydrogen cyanide, than tobacco smoke.
MINNEAPOLIS, Jan. 2 (UPI) -- A carcinogenic chemical in tobacco products was found in toenails of smokers and non-smokers exposed to secondhand smoke, U.S. cancer researchers said.
SAN DIEGO, May 24 (UPI) -- People who smoke marijuana -- even heavy, long-term marijuana users -- appear not to be at increased risk of developing lung cancer, says a U.S. study.
MINNEAPOLIS, May 12 (UPI) -- U.S. scientists have detected cancer-causing chemicals associated with tobacco smoke in the urine of nearly half the babies of smoking parents.
SACRAMENTO, June 14 (UPI) -- Tobacco smoke has been linked to more than 60 percent of cancer deaths among African-American men, according to a new analysis.
SAN FRANCISCO, March 9 (UPI) -- Researchers at California's Air Resources Board have concluded women exposed to secondhand tobacco smoke have a 90 percent higher risk of breast cancer.
LONDON, Jan. 28 (UPI) -- New evidence makes a stronger case against the dangers of second-hand smoke, a major European study says.
PHILADELPHIA, Jan. 17 (UPI) -- Tobacco smoke triggers the production of COX-2, a cellular protein linked to the development and progression of cancer, a U.S. study found.
