A small study from Sweden has found that the anti-oxidants vitamin e and acetylcysteine speed up the progression of lung cancer in mice.
The surprising findings have caught doctors off guard since the anti-oxidant properties of fruits, vegetables and supplements are often touted as healthy with disease-risk lowering properties.
Previously, a few studies have linked cancer to high doses of anti-oxidants, but the Swedish researchers said they used normal dietary doses of vitamin e and relatively low doses of acetylcysteine.
The researchers caution that more studies need to be performed before giving patient recommendations, but suggest that those with lung cancer may not want to take vitamin e supplements. Examples of other anti-oxidants include vitamins a and c.