Aspartame
E 951Aspartyl-phenylalanine methyl ester
Sweetener
Aspartame is a sugar substitute used to make foods and drinks taste sweet without adding calories. It's made from two amino acids, aspartic acid and phenylalanine, which are combined with a methyl group.
Moderate Concern
Source: FDA GRAS list
Some people are concerned about aspartame because it contains phenylalanine, which can be a problem for people with phenylketonuria (PKU), a rare genetic disorder.
No result found for this ingredient.
r/keto
1657
Sweeteners and Keto: with all the new people for 2017, I decided to make a sweetener guide!
The Safety Profile of Aspartame: A Review of Regulatory Standards and Emerging Health Concerns.
Öncel HU, Sökmen Z
2026
Read on PubMedRelated Ingredients
Last updated: May 16, 2026