The ADI represents the safe level of consumption of an ingredient on average per day over a person's lifetime. It is expressed in milligrams per kilogram of body weight. The ADI for aspartame has been set at 40mg per kg of body weight. To put this in perspective, in a single day an adult weighing 70 Kg (154 lb) would need to consume 97 packets of table top sweetener or 7 liters of a diet soft drink to reach aspartame's ADI.