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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:



Protein analysis is typically based on a Nitrogen analysis and assumed factors to calculate protein. Since proteins are not the only source of Nitrogen, Protein analysis can be falsely inflated by a variety of ingredients and other food components. Check out this infographic to learn more about non-protein nitrogen.


In the world of dietary supplements, ingredient authenticity is directly linked to quality, compliance, safety, and consumer trust. With the complexity of botanical materials and the limitations of individual testing techniques, relying on a single method for identity verification can be risky. That’s where orthogonal methods come in. Read to learn more.


Photostability testing is crucial for ensuring the safety, efficacy, and quality of products. While there are not specific requirements, the FDA makes it clear it is recommended for all products susceptible to light. Check out our infographic about the importance of photostability testing in OTC products.


After months of fine-tuning flavor, texture, and active ingredients, a new nutritional formula was ready for scale-up. This case study explores the successful transition from lab-scale to full-scale production—preserving product integrity across thousands of gallons.


Ensuring the safety, quality, and authenticity of dietary supplements has become increasingly complex in today’s global marketplace. To protect consumers and brands alike, robust quality systems, third-party certifications, and traceability measures are essential. This webinar highlights key integrity challenges facing the dietary supplement industry, from misleading claims to adulteration concerns, and advanced analytical solutions that address them.


Join us for a focused session on Eurofins’ new Product Certification program—designed to set a higher standard for quality and transparency across the dietary supplement, food, and retail industries. Learn why certification matters, how the process works, and what makes Eurofins uniquely qualified to deliver a seal backed by nearly 100 years of testing expertise.


Discover how GLP-1 medications are reshaping consumer behavior and driving innovation in food, beverage, and supplement industries , ushering in the “smaller-appetite era” of nutrition and wellness.


Eurofins Food Chemistry Testing, Madison and Eurofins Assurance are pleased to announce the launch of Clean Sport Certified. This Product Certification programme is designed to safeguard the quality of dietary supplements, ingredients and food intended for athletes. Brands, retailers, and facilities in the dietary supplements industry can leverage this programme to demonstrate their commitment to regulatory compliance and quality. Click to learn more about this new certification.


Discover how dietary supplement companies can proactively mitigate risk—from sourcing to packaging—to protect product integrity, brand reputation, and consumer trust.


Have questions about the Eurofins ANSI 173 Finished Dietary Supplement and Ingredient Certification or Eurofins Protocol 101? Check out our guide for the answers to frequently asked questions regarding Eurofins Certification.


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