Galacto-oligosaccharides are produced from lactose and are used as prebiotics. They pass undigested into the colon where they increase bowel mass and help stimulate good bacteria in the intestine, which may provide immune benefits.1

Several clinical studies have found that Galacto-oligosaccharides’ prebiotic effect enhances the growth of bifidobacteria which benefits bowel function.2

This ingredient can be found in the following products in United States:


  1. Natural Medicines: Comprehensive Database. Stockton, CA: Therapeutic Research Faculty, 2000.
  2. Scand J Food Nutr. 2007 Jun; 51(2): 62–66. doi: 10.1080/17482970701414596