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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:



Discover how SDS-PAGE, a powerful protein analysis method, supports ingredient quality, transparency, and innovation in the food industry—from meat and dairy to plant-based products.


With growing scrutiny from lawmakers and public health advocates, the once-standard GRAS (Generally Recognized as Safe) process may be on the verge of a major overhaul. In this blog, we break down what GRAS really means, why the self-affirmed process has sparked concern, and how the proposed legislation could redefine the future of ingredient approval in the U.S. food system.


Eurofins Food Chemistry Testing, Madison and Eurofins Assurance are pleased to announce the launch of product certification designed to safeguard the quality of dietary supplements, ingredients and food. Brands, retailers, and facilities in the dietary supplements industry can leverage these new schemes to demonstrate their commitment to regulatory compliance and quality. Click to learn more about this new certification.


Product certification plays a vital role in minimizing the potential risks of adulteration, contamination, and other quality issues in your product. This infographic outlines the steps to earning the Eurofins Assurance Mark for your dietary supplement, ingredient, or food product.


In May, the Trump Administration released the Make Our Children Healthy Again report—commonly referred to as the MAHA Report. As a new conversation unfolds, let Eurofins help you dive into its implications for the food industry through a series of weekly posts. While the report spans a broad range of topics, our lens will remain focused on the food, beverage, and consumer goods sectors—where we continue to support companies navigating change and driving innovation. Keep reading to find out more on MAHA Report.


Discover how the Eurofins Botanicals and LeafWorks partnership are advancing transparency in the booming functional mushroom market with species-specific DNA ID testing. Ensure product authenticity, support label claims, and meet regulatory standards with cutting-edge qPCR assays and comprehensive analytical solutions.


In the world of dietary supplements, where natural ingredients are marketed for health and wellness, the quality and identity of botanicals are non-negotiable. Consumers rely on accurate labeling, consistent formulation, and, most importantly, safe and authentic ingredients. Continue reading to learn more about ensuring safety in botanical supplement products.


Accurate determination of creatine and its degradation product, creatinine, in raw materials and finished products is essential for quality control and regulatory compliance. This webinar will provide an overview of best practices in HPLC creatine and creatinine testing in diverse range of products, including protein powders, pre-workout formulations, beverages, and gummies. Originally Recorded on August 8, 2025


Chlorates and perchlorates are chlorine-based oxyanions that have emerged as contaminants of concern in the food and dietary supplement industries. These compounds are highly soluble in water and persistent in the environment, making them difficult to eliminate once introduced into the supply chain. Continue reading to learn what you can do to test for these contaminants.


Ensure compliance and product safety with Eurofins' USP Microbiology Services. Learn how USP Testing and Suitability Testing help validate methods for dietary supplements, probiotics, and botanicals while avoiding false negatives and regulatory pitfalls.


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