Expert Pharmaceutical is a newly established dietary supplement manufacture and packaging provider in the City of Industry, California. Our facility has been designed, engineered, and managed strictly adhering to the FDA rule 21 CFR part 111 - cGMP in Manufacturing, Packaging, Labeling, or Holding Operations for Dietary Supplements.

Our team members are committed to developing safe, effective, and innovative proprietary products of herbal extracts, vitamins, and other nutritional supplements with a combination of modern and traditional medical knowledge, we are passionate about helping brand owners manufacture and bring high-quality dietary supplement products to the market.​

Willow Liu, Ph.D.


Our founder and CEO, Dr. Willow Liu is a natural product expert with 35 years of experience in research, teaching, and practice of herbal medicine, the President of American Association of Chinese Herbs (AACH), the editor and key author of Traditional Herbal Medicine Research Method - Identification, Analysis, Bioassay, and Pharmacological and Clinical Studies. It's the only book available worldwide that fully introduces research methods for traditional herbal medicine using modern botany, chemistry, biochemistry, pharmacology, and clinic study. 

She was trained in the groups of several world-renowned pioneers of natural products (Prof. Xinsheng Yao in China, Prof. Rudolf Bauer in GermanyProf. Koji NakanishProf. Norman Farnsworth, and Prof. John Pezzuto in the USA).

Dr. Willow Liu had taught in several colleges in China and the USA including but not limited to Natural Product Chemistry, Modern Nutrition, Modern Pharmacology, Nutrition of Chinese Medicine, and Chinese Materia Medica. 

Dr. Liu's Education, Research & teaching Background:
Post-doctoral Research Scientist at Columbia University (New York)

Ph.D. of Natural Product Chemistry (China)

M.S. of Medicine (China)

B.S. of Chinese Material Medica (China)

Research Fellow of Alexander von Humboldt Foundation (Germany)

Professor in Liaoning College of TCM (China)

Visiting Research Assistant Professor in College of Pharmacy, University of Illinois at Chicago (Chicago, USA)

Professor (Part-time) in South Baylo University, College of Acupuncture and Oriental Medicine in Southern California University of Health Science, and Alhambra Medical University

Dr. Liu with the former German president Roman Herzog in 1996

Brian Guo

Brian Guo, Ph. D., is a natural product chemist with interest and experience in the chemical and biological analysis of botanicals. He received his doctorate in Pharmacognosy from the University of Illinois at Chicago under the mentorship of Dr. Chun Tao Che, the Harry H. S. Fong Professor of Pharmacognosy. His research focused on the isolation and elucidation of novel bioactive phytochemicals from traditional medicinal plants. He was also trained in analytical chemistry techniques for natural product structure elucidation and metabolomics. Previously, he received his B.S. and M.S. in Biomedical Engineering from Northwestern University, followed by working in Renal Product Development at Baxter Healthcare in Round Lake, Illinois.

Chief Scientist
Lab Manager

Ms. Gao received her bachelor’s degree in Bioengineering and master’s degree in Analytical Chemistry. Before joining Expert Pharmaceutical, she worked as a Research & Development Chemist for several years in another manufacturer of dietary supplements, being responsible for formulation and product development. She knows well about FDA and cGMP regulations. After joining Expert Pharmaceutical, as a team leader, she has been in charge of producing many different kinds of nutritional products for the clients and solved all kinds of technical problems, closely cooperated with the QA department and successfully got NSF GMP Certificate. 

Yidi Gao
Operation Director
Kaylee Jin 

Ms. Kaylee received her bachelor’s degree in Food science and Technology and master’s degree in Human Nutrition. She is a well-trained quality assurance manager with strong managerial experience in both food and dietary supplement processing companies and with comprehensive knowledge of quality compliance, regulatory affairs, and product safety. After joined Expert Pharmaceutical as a Quality Assurance manager, she has developed all aspects of Quality system and product safety plan and enforced strict GMP implementation throughout production, and thus, successfully pass the NSF audit with an outstanding grade. 

QA Manager