People

A multidisciplinary team

Scientists, clinicians, regulatory specialists, and business leaders working together across discovery, development, quality, and clinical translation.

Portrait of Xiu-Min Li
Co-founder

Xiu-Min LiMD, MS, MPH

Dr. Li develops botanical medicines for allergic and inflammatory conditions, with an emphasis on translating laboratory discoveries into practical applications and evidence-based clinical outcomes. Her work in food allergy, asthma, eczema, and integrative health has resulted in more than 100 peer-reviewed publications.

Portrait of Allen Xue
Chief Executive Officer

Allen XueMS

Mr. Xue oversees talent and resource development for GNT’s botanical drug programs. He earned a BS in Chemical Engineering Technology from Zhengzhou University and an MS in Biotechnology from Johns Hopkins University, with additional training in international business and economics.

Portrait of Nan Yang
VP of Production · Director of GMP & CMC

Nan YangPhD

Dr. Yang leads analytical chemistry and quality control work at GNT. His expertise includes HPLC, LC-MS, immunobiology, and molecular biology. He serves as principal investigator for GNT’s SBIR/STTR awards, supports multiple NIH programs, serves as a primary FDA liaison for IND work, and oversees CMC data for clinical development programs.

Portrait of Alissa Grzybowski
Co-founder · VP of Development

Alissa Grzybowski

Ms. Grzybowski brings experience in operations, human resources, corporate wellness, and business consulting. At GNT, she has led the Dietary Food Tolerance Program and work on tolerogenic food products intended for use as foods or dietary supplements.

Portrait of Michelle Carnazza
Postdoctoral Researcher

Michelle CarnazzaPhD

Dr. Carnazza earned her doctorate in Pathology, Microbiology and Immunology from New York Medical College in 2024. At GNT, she applies bioinformatics, microbiology, gene editing, molecular biology, and in vitro models to investigate natural compounds in food allergy and cancer research.

Portrait of Jake Knight
Cosmetic Chemist

Jake KnightBS

Jake earned a BS in Chemistry from Ramapo College of New Jersey and conducted graduate research in synthetic chemistry and enzyme mechanisms at the University of Florida. At GNT, he develops, prepares, and tests eczema formulations while supporting product quality, safety, and regulatory compliance.

Portrait of Kamal Srivastava
Research Consultant

Kamal SrivastavaPhD

Dr. Srivastava reviews nonclinical and clinical research, including animal-model studies and work involving patient samples, and supports IACUC and IRB submissions. She contributes expertise in immunology, allergy, cell and molecular biology, physiology, and IND-related research.

Portrait of Hugh A. Sampson
Medical Consultant

Hugh A. SampsonMD

Dr. Sampson is an internationally recognized food allergy researcher with extensive experience in clinical study design and interpretation. He has collaborated with Dr. Li on herbal formula trials and has advised GNT’s NIH and SBIR work.

Portrait of Jera (Qianhui) Zhang
Nutrition Advisor

Jera (Qianhui) ZhangMS, MA, PhD

Dr. Zhang is a New York-based registered dietitian nutritionist, licensed dietitian, certified lactation counselor, and trained Low-FODMAP practitioner. She earned a PhD in Behavioral Nutrition from Teachers College, Columbia University.

Portrait of Danna Chung
Medical Advisor

Danna ChungMD

Dr. Chung is board certified in allergy and immunology, internal medicine, and integrative medicine. She has helped lead East-West integrative medicine programming at New York Medical College and has collaborated with Dr. Li in patient care and TCM publications.

Portrait of David Dunkin
Medical Advisor

David DunkinMD

Dr. Dunkin is a board-certified pediatric gastroenterologist and associate professor at the Icahn School of Medicine at Mount Sinai. His research with Dr. Li addresses gastrointestinal allergic disorders and Chinese herbal medicines for IBD and eosinophilic esophagitis.

Business Advisor

David Schlessinger

Mr. Schlessinger founded Encore Books and Zany Brainy and co-founded Five Below, where he served as executive chairman. He advises GNT on strategy, best practices, and business operations and has supported research into IgE-inhibitory natural compounds.

Portrait of Henry Ehrlich
Communications Director

Henry Ehrlich

Mr. Ehrlich is an author and former professional speechwriter. He has written and co-authored books about food allergy, allergic disease, eczema, and traditional Chinese medicine, and supports GNT correspondence, social media, and public relations.