Final answer:
The Tolerable Upper Intake Levels (UL) are the maximum levels of daily nutrient intakes that are unlikely to pose health risks to almost all individuals in a specific group. They provide guidance on the upper bounds of nutrient intake to prevent excessive intake and adverse health effects.
Step-by-step explanation:
The Tolerable Upper Intake Levels (UL) are the maximum levels of daily nutrient intakes that are unlikely to pose health risks to almost all individuals in the group for whom they're designed. It is important to note that the UL is often referred to as the 'upper limit' by some people. The UL provides guidance on the upper bounds of nutrient intake to prevent excessive intake, which can lead to adverse health effects.