Environmental Factors That May Affect ALS Risk
Smoking. Smoking is really the only likely environmental risk factor for ALS. It seems to be greater for women particularly after menopause.
Environmental toxin exposure. Studies have shown that exposure to lead and other substances in the home or workplace may be linked to ALS, though no single chemical or agent has been consistently associated with ALS.
Military service. It’s unclear exactly what about the military service may trigger the development of ALS though recent studies show that people who served in the military are at higher risk of ALS. It may include exposure to certain metals or chemicals, traumatic injuries, or intense exertions.
