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Prebiotics, Probiotics, and Postbiotics—Oh My! Navigating the Wild World of Dental Health Supplements

Gut Health and Microbiome

Presented by:  Rachelle Beattie, PhD

Original Lecture/ Publication Date: December 12, 2025 (Webinar Series)

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Course Description:

With supplement marketing louder than ever, this course helps clinicians separate science from hype. Dr. Beattie McAliley will break down what difference the range of “biotics” actually makes in the oral cavity and offer clear tools for identifying meaningful, evidence-based benefits.

Learning Objectives:

  1. Describe the roles of prebiotics, probiotics, and postbiotics in shaping the oral microbiome.
  2. Summarize current research on biotic-based strategies for oral wellness.
  3. Recognize red flags and limitations in dental supplement marketing.

Practical Applications:

  1. Guide patients toward options supported by research rather than brand-driven messaging.
  2. Identify when prebiotic or postbiotic support may be more suitable than probiotics alone.

Speaker Bio: 

Dr. Rachelle E. Beattie, PhD, is a microbial ecologist and the Head of Research and Development at ProBiora Health. With a strong foundation in environmental health research, Dr. Beattie has explored how industrial agriculture impacts antimicrobial resistance and how rural communities can address microbial contamination. Since transitioning to human health, she now focuses on the oral microbiome, studying how probiotics can improve oral health outcomes, especially in underserved communities.

Dr. Beattie is passionate about consumer transparency and bringing evidence-based insights into the science behind probiotic products. She earned her PhD from Marquette University, completed postdoctoral research at the University of North Carolina at Chapel Hill, and previously worked as a Research Microbiologist for the U.S. Geological Survey.

AGD Course #:

730 (Oral Medicine, Oral Diagnosis, Oral Pathology)

Conflicts of Interest: 

Affiliated with ProBiora Health