Science-backed gut health
Gut health, backed by real science
Meet the gastroenterologists, nutrition doctors, and researchers behind every GutRx formula.
GutRx by the numbers
4
Doctors and PhD-level scientists guiding our formulas
3
Leading research universities represented
20,000+
Customer reviews at an average 4.8 stars
100%
Formulas reviewed by our credentialed advisors
The experts behind GutRx
Meet the gastroenterologists, nutrition doctors, and research scientists who guide how we formulate every product.
Co-Founders
Co-Founder & Medical Advisor
Dr. Roshini Raj, MD
Board-certified gastroenterologist
Dr. Roshini Raj is a board-certified gastroenterologist and internist, an Associate Professor of Medicine at NYU School of Medicine, and an attending physician at NYU Langone Medical Center.
She earned her medical degree from NYU and her undergraduate degree from Harvard College.
One of the country’s most recognizable voices in digestive health, she is the author of Gut Renovation and a regular medical contributor on The Today Show, CNN, and Fox News.
Her expertise in the gut microbiome helps keep GutRx formulas clinically grounded and genuinely useful for real patients.
Co-Founder & Clinical Advisor
Dr. Mariela Fierro, PhD, LDN
Integrative & functional nutrition
Dr. Mariela Fierro is a doctor of integrative and functional nutrition and a licensed dietitian/nutritionist (LDN) whose work centers on research-driven, personalized approaches to preventing and managing chronic disease.
She specializes in gut-microbiome testing and individualized nutrition therapy, building personalized dietary plans and tracking outcomes through careful data analysis.
Her evidence-based approach has helped patients achieve lasting results, from improved gut health and lipid profiles to weight loss and remission of metabolic conditions.
At GutRx, she ensures our products fit into real, sustainable everyday nutrition.
Scientific Advisory Board
Scientific advisor
Dr. Ron Orlando, PhD
Glycoscience researcher, University of Georgia
Dr. Ron Orlando is a Distinguished Research Professor of Biochemistry and Molecular Biology at the University of Georgia and a longtime member of its Complex Carbohydrate Research Center (CCRC), where he leads the mass spectrometry facility.
He earned his PhD in analytical chemistry from the University of Delaware and has spent his career advancing the study of glycoproteins and glycosylation, the sugar structures on cells that are increasingly central to immunity, digestion, and disease.
A prolific researcher and inventor, he has co-founded three science companies and was named a Regents’ Entrepreneur by the University System of Georgia.
For GutRx, he helps ensure our formulations are grounded in rigorous, publishable science.
Scientific advisor
Dr. Jarrod Barnes, PhD, MBA
Glycobiology researcher, University of Alabama at Birmingham
Dr. Jarrod Barnes is a faculty researcher in the Division of Pulmonary, Allergy and Critical Care Medicine at the University of Alabama at Birmingham (UAB).
He earned his PhD at the University of Georgia and trained in glycobiology at the Complex Carbohydrate Research Center, studying how glycans, the sugar molecules coating our cells, shape human health and disease.
His work examines how glucose metabolism and glycosylation drive cellular behavior, at the frontier of understanding how nutrition and the microbiome influence the whole body.
He pairs this research depth with an MBA, giving GutRx an advisor who understands both the science and the responsibility of bringing health products to the people who need them.
Partner with us
Interested in partnering with GutRx?
GutRx is always seeking strategic partners and investors who share our mission of helping more people find relief from digestive stress. If you're passionate about improving lives through science-backed gut health, we'd love to hear from you. Reach out anytime at hello@GutRx.com.
