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Douglas L. Marshall

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Douglas L. Marshall, PhD, CFS

Douglas L. Marshall, PhD, CFS

Chief Scientific Officer

Dr. Marshall is Chief Scientific Officer with Eurofins Microbiology Laboratories, Inc., a division of the global life sciences company Eurofins Scientific.  He is co-founder and Director of the Food Safety Institute, LLC, an integrated consulting and analytical services company affiliated with the Eurofins network of companies.  He is Technical Director for the Refrigerated Foods Association and Microbiology Task Force Chair for the American Spice Trade Association.  His former positions include the following:

  • Associate Dean and Professor of Public Health, College of Natural and Health Sciences, University of Northern Colorado
  • Adjunct Professor with the Colorado School of Public Health and Colorado State University
  • Professor of Food Science, Nutrition, and Health Promotion at Mississippi State University
  • Assistant Professor of Food Science at Louisiana State University
  • Contributing Editor for the peer-reviewed scientific journal Food Microbiology
  • Four consecutive terms on the editorial board of the Journal of Food Protection

He is a frequent volunteer and consultant to trade associations, NIH, WHO, FAO, USDA, and other government agencies and private companies.  His research and expertise has been featured in popular press venues such as Consumer’s Reports, Fine Cooking, USA Today, Fitness, Health, Men’s Health, Chemtech, Nature Science Updates, and ASM Journal Highlights.  He is a frequently invited speaker and a prolific book chapter writer. With over 250 publications, over 300 invited presentations, and over 100 workshops delivered, his scientific research and outreach interests focus on improving the microbiological quality and safety of foods, with emphasis on meat, poultry, seafoods, and produce.  Among these was the completion of the 4 volume Handbook of Food Science, Technology, and Engineering, which he Co-Edited.  He has been the recipient of a number of awards for his scholarly efforts including the Mississippi Chemical Corporation Award of Excellence for Outstanding Work, the International Association for Food Protection Educator and Harold Barnum Industry Awards.  He is a Fellow and former member of the Board of Directors of the Institute of Food Technologists, inaugural Chair of the International Food Science Certification Commission, and former member of the Board of Directors of the American Spice Trade Association. 

On a personal note, early in his career he served as a deck hand on an Alaskan fishing vessel (well before Deadliest Catch) and prefers to spend his free time lost on a trail in the Colorado Rocky Mountains.

Below are resources from Douglas:



When you're dealing with a complex matrix, the real question isn’t “Can it be tested?”—it's “What are you hoping to uncover?” Many things can be tested, but the answers depend on asking the right questions. Learn more about testing complex botanical matrices by clicking the link.


Certain seasonal botanicals may play a vital role in supporting women's health and overall wellness. Shatavari, dong quai, and milky oats are known for their deeply nurturing qualities, fostering balance, resilience, and gentle strength within the body. Click the link to continue exploring the benefits of these plants and their contributions to health and well-being.


In the world of dietary supplements and botanical materials, accurate identity testing is essential for product safety, regulatory compliance, and consumer confidence. One of the most effective tools in this area is Thin Layer Chromatography (TLC), particularly in its high-performance form (HPTLC). Continue reading to find an overview of HPTLC, compendial HPTLC methods, selecting a fit-for-purpose method, the acceptance criteria, and the advantages and limitations of compendial methods.


An entrepreneurial brand wanted to develop a shelf-stable liquid formula that could deliver proven joint-supporting ingredients in a convenient, consumer-friendly format. They turned to The National Food Lab for help to bring their concept from ideation to execution with scientific rigor and market-readiness. Keep reading to find out how we handle these situations.


Botanical innovation is reshaping how companies approach sourcing, formulation, and delivery. Learn how forward-thinking brands are aligning strategy, ensuring scalability, and meeting rising consumer and regulatory demands.


June 24th, 2025– In response to evolving regulatory expectations and growing public health concerns for Bisphenol A (BPA), Eurofins Food Chemistry Testing Madison, Inc. (EFCT) has expanded its advanced testing capabilities to detect and quantify BPA. Read our press release to learn more.


HPTLC is more than just a laboratory technique; it’s a cornerstone of quality assurance in botanical testing. This article delves into the information that should accompany your sample, explaining its scientific significance and role in meeting regulatory standards, in order to ensure accurate analysis.


Discover the crucial role of botanical reference materials (BRMs) in supplement quality and regulatory compliance. Learn how BRMs help ensure product integrity and support industry standards.


As the popularity of the natural mood-enhancing properties of sceletium alkaloids increases, the volume of products containing these compounds will increase, and therefore also the need for robust and selective methods for determining the concentration of alkaloids within these products. Watch our webinar about an innovative HPLC-DAD method for the determination of sceletium alkaloids in powders, capsule fills, and tablets. Originally Aired May 15, 2025


When the analysis performed on a client's green tea extract sample was deemed inconclusive, the client was left unable to confirm the extract’s quality and consistency. Learn how the team of botanical experts at the Eurofins Botanical Laboratory solved this challenge.


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