Billions of Bacteria, Uncertain Benefits: What the Science Actually Says About Probiotic Supplements
The probiotic supplement market generates billions of dollars annually on the promise of better gut health, yet clinical evidence for many of its boldest claims remains thin. Understanding which conditions have genuine scientific support—and which strains are studied versus merely marketed—can save you money and steer you toward interventions that genuinely work. For many Americans, the answer may already be sitting in their refrigerator.