Allulose, also known as D-psicose, is a type of low-calorie sweetener that occurs naturally in small quantities in some fruits, such as figs and raisins. It has a similar taste and texture to sugar, but with about one-tenth of the calories.
In protein powders, allulose is often used as a natural alternative to sugar or artificial sweeteners. It can be added to enhance the taste and sweetness of the product without adding extra calories.
In terms of safety, allulose is generally considered safe for consumption by the U.S. Food and Drug Administration (FDA) and the European Food Safety Authority (EFSA). It is also considered safe for individuals with diabetes, as it does not raise blood sugar levels.