Acesulfame potassium is an artificial sweetener added to food and beverages. It's also known as Ace-K or Acesulfame K, and is sold by manufacturers such as Sweet One and Sunett. It's about 200 times sweeter than conventional sugar, which means much less is needed to achieve that sweet taste. It's deemed safe for consumption by the FDA, but some studies suggest it can shift the gut's microbiome and cause inflammation over time. Because it is an artificial sweetener, I recommend avoiding this ingredient.