of a substance (such as a food-additive or pesticide residue) to which an individual
can be exposed
to (through contact
or intake), on a daily
basis over his or her life span (estimated at 70 years), without causing any harmful effects. ADI is measured usually in milligrams of the substance, per kilogram of body weight
of the exposed person
, per day (mg/kg/day). See also reference dose.