People with higher levels of metals found in their blood and urine may be more likely to be diagnosed with — and die from — amyotrophic lateral sclerosis, or ALS, a new study suggests. Investigators also discovered that participants working in occupations with a higher likelihood of metal exposure had increased levels of metal mixtures in their blood and urine. Researchers say by avoiding high risk activities associated with metal exposures, individuals might lower their overall exposure and potentially mitigate risk.