Petroleum based chemical substances are believed examination help cause these complications by exam help variety of routes including impairing proper DNA Gene expression, weakening DNA Repair, accelerating gene loss, degeneration of the bodys detoxing defenses liver quiz help kidneys in addition to gradual weakening of the brains fundamental defense the Blood Brain Barrier. Of large concern, while petroleum based chemical substances are required by the U. S. Government EPA exam help be tested for exam help range of health outcomes, they aren’t required examination help be tested for subtle neurological damage memory, character, conduct etc, damage examination help the developing brain during pregnancy, exact immune system effects, autoimmunity quiz help results upon the brains primary defense the blood brain barrier. Also, the recent toxicology field of endocrine disruptor chemical substances is of excessive significance since many common chemicals quiz help insecticides are actually being found examination help alter normal hormone levels in the blood controlling advancement quiz help aging. The majority of assistance at CHEM TOX has been attained from research from the University of Florida quiz help University of South Florida Medical Libraries.