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The buildup of exposures, which researchers call the ALS exposome, is possibly associated with recreational activities such as woodworking and gardening.

"Exposures in the home setting are an important part of the ALS exposome, as it is one place where behavior modifications could possibly lessen ALS risk."

Researchers call this lifetime accumulation of exposures the ALS exposome.

The vast 'exposome' of chemicals that humans are exposed to on a daily basis is a sign of our times, according to Samanipour.

Prior to this, researchers have studied single exposures individually but have not analyzed the entire exposome – a comprehensive characterization of all exposures.