The FDA recommendation for aspartame is to consume less than 50 mg per kilogram of body weight per day (mg/kg/day). In Europe, the recommended limit is slightly lower, at less than 40 mg/kg/day. One can of diet soda would amount to about 5 mg/kg for a 40-60 kg person, or 200–300 mg in total. It’s worth noting that ASBs are not the only source of NNS, and other food products must also be considered when estimating total NNS intake.^[1] Other NNS safe dosage recommendations include:^[2]

• Acesulfame K: 15 mg/kg/d
• Sucralose: 5 mg/kg/d
• Saccharine: 15 mg/kg/d
• Steviol glycosides (e.g., rebaudioside A): 4 mg/kg/d

ASBs often use combinations of these ingredients, so adding up the amounts can be confusing. For example, Diet Coke uses only aspartame, but Coke Zero combines aspartame and acesulfame K.