Dr. Stephen Langer's Ultimate 16 Strain Probiotic includes more than four times the number of strains and over twice the number of CFUs compared to many popular probiotic formulations marketed in clinics and pharmacies today. While many popular supplements provide only two strains of bifidobacteria, Dr. Langer's formula delivers five. And while others have only one strain of lactobacillus, Ultimate 16 Strain Probiotic features ten, including Lactobacillus reuteri, which was recently added to improve the formula because of the unique protective abilities it offers for colon health and immune system function.And that's not all. The formula also includes the prebiotic FOS and ConcenTrace® trace minerals, which you won't find in any off the shelf product. Prebiotics and trace minerals are important because most of us are lacking them in our diets, but they're absolutely vital to the enzymatic processes necessary for healthy digestion and the maintenance of beneficial bacteria.Don't be fooled by mass market products that over promise and under deliver—products that also cost more than they should. With this state of the art formula you'll feel the difference in as little as one month. It's the ultimate probiotic at a truly affordable price.