Clinical Trials
Independent, university-supervised clinical trials around the world.
preB is not just another supplement. Its effects have been studied in formal clinical trials in Japan, the United States, Brazil, and China.
The published reports
United States · Independent U.S. clinical study
Clinical trial in the United States
A U.S. clinical trial followed participants taking preB daily for 30 days. Subjects reported marked improvements in regularity, digestive comfort, and overall well-being, with laboratory work confirming shifts toward a healthier intestinal flora profile.
Japan · Kitasato University
Clinical trial in Japan — Kitasato University
A double-blind, placebo-controlled clinical trial conducted at Kitasato University in Tokyo, Japan, studied preB's effect on human intestinal flora and immune markers. Participants taking preB showed significant improvement in beneficial bacteria counts and general intestinal condition compared to placebo.
Brazil · Clinical study, Brazil
Clinical trial in Brazil
Conducted in Brazil, where preB is grown and manufactured, this trial examined preB's effects on intestinal health and nutrient absorption among a locally recruited group. Results confirmed preB's prebiotic action and its safety for daily use.
Japan & China · Japan–China joint study
Clinical trial in Japan and China
A joint Japan–China clinical study investigated preB's influence on immune function and skin health. Findings included improved immune response markers and subject-reported improvements in skin clarity and texture.
Read the full clinical reports
The complete clinical reports are available as PDF downloads for your review:
- U.S. clinical report (PDF)
- Kitasato University, Japan — clinical report (PDF)
- Japan–China clinical report (PDF)
- Brazil clinical report (PDF)
These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure or prevent any disease.