Klean Athlete Klean Probiotic supports immune system and intestinal microflora. Probiotic dietary lactobacilli and bifidobacterium colonize the intestinal tract. The composition of the intestinal microflora is dynamic and constantly changing. If harmful microorganisms proliferate, the equilibrium is disturbed, and it becomes difficult even for indigenous bacteria to maintain their necessary territory to colonize the intestine. Antibiotics tend to kill off both beneficial and harmful bacteria and thus may also disturb the normal, healthy balance of intestinal microorganisms. Klean Recovery is tested and certified by the NSF Certified for Sport program, which was created to meet the growing demands of athletes, coaches and healthcare professionals to certify that sports supplements are safe and completely free from banned substances. Every product that carries the NSF Certified for Sport mark has undergone stringent laboratory testing to confirm content, purity and compliance. Recommended Use: Adults take one capsule daily or as directed by a healthcare professional. May increase to 1 capsule twice daily if desired.