
Our Nutritionists
Meet our team of Registered Nutritionists specializing in the microbiome under Dr. Mahmoud Ghannoum.
The BIOHM Advantage
Studying under our co-founder, Dr. Ghannoum, having access to one of the largest microbiome datasets, and armed with each customer’s lab tested bacterial and fungal communities, we feel confident when we say that our Microbiome-Trained Registered Nutritionists can provide the type of guidance that most people have not been able to find much of their lives.

Meet Some of Our Wellness Experts

Katie Oleksak
MSN, APRN, FNP
Director of Clinical Education
Katie Oleksak, MSN, APRN, FNP is a Nurse Practitioner with specialized clinical experience in gastroenterology, nutrition, weight management, gut health, and functional medicine. She plays an active role in the ongoing development of microbiome testing and educational initiatives at BIOHM, where she is committed to advancing the understanding of the microbiome's profound impact on health and wellness.

Hillary Marconcini
RD

Ruby Baggan
MS, RDN