These results suggest that at least some antioxidants may reduce the oxidative damage and consequent health effects of tobacco smoke. Arsenic research focused on the respiratory system effects resulting from drinking arsenic contaminated water. Preliminary findings in a study in West Bengal, India, show increased chronic respiratory disease in persons with skin lesions due to arsenic poisoning. A new lung cancer study incorporating genetic biomarkers of susceptibility and tumor DNA analysis has been commenced in an arsenic exposed area in Argentina. A high exposure study in West Bengal is focusing on respiratory system effects.
Further work continues cornering nutritional susceptibility to arsenic effects.
Toxicological and epidemiological is discussed regarding several common misconceptions about the causes and cancer prevention of cancer. Human exposures to rodent carcinogens as synthetic pesticide residues, pollutants, pharmaceuticals, and workplace exposures are compared to the broader and greater exposure to natural chemicals in the diet. Whereas prescription pharmaceuticals are federally regulated for purity, identification, and manufacturing procedures and additionally require evidence of safety and efficacy, dietary supplements are not similarly regulated. Herbal supplements have not been a focus of carcinogenicity testing. To provide a broad perspective on possible cancer hazards and possible toxic hazards from supplements, staff ranked a wide variety of exposures including herbal supplements.