Amino acid sugar and primary constituent of mucopolysaccharides and hyaluronic acid. Acetyl glucosamine can be considered a skin-restoring ingredient.
In terms of exfoliation, the research that does exist was performed by Proctor & Gamble and by Estee Lauder, and both companies sell skincare products with acetyl glucosamine. In terms of its antiwrinkle action, there is no research supporting this.
Acetyl glucosamine also has research demonstrating that it can have skin-brightening benefits, particularly when combined with niacinamide. Most of the research concerning acetyl glucosamine’s effect on uneven skin tone is from Procter & Gamble, and their Olay brand uses acetyl glucosamine in many products. Still, the research is compelling and the protocols are sound.