Uncertainty is the imperfect knowledge concerning the present or future state of an organism, system, or (sub)population under consideration.
Sources of uncertainty in a dietary exposure assessment are from either the chemical concentration data, the food consumption data, or from both
Current practices used to address uncertainty simply represents its presence in the chemical concentration data and food consumption data.
Because uncertainty is identified and represented it allows for dietary exposure estimates to be characterized for uncertainty.
Finally, in order to reduce uncertainty in the chemical concentration data and food consumption data more sampling and analyses is needed however variability will still be present.