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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:



In today’s food, dietary supplement, and beverage industry, ensuring accurate sugar content in products is more important than ever. With increasing consumer awareness about nutrition and stricter regulatory requirements, companies must verify and control the levels of sugars present in their products. Sugar testing plays a vital role in maintaining product quality, meeting labeling regulations, and supporting claims such as “low sugar,” “no added sugar,” and “zero sugar.” This blog explores the different types of sugars and sweetener alternatives and considerations when submitting products for testing.


Ensuring the safety and quality of dietary supplements is a cornerstone of regulatory compliance. Among the most critical steps in this process is establishing specifications for chemical contaminants. These contaminants, which can arise from raw materials, manufacturing processes, or environmental exposure, must be controlled to meet the standards outlined in the Code of Federal Regulations (CFR). This guide is designed to assist manufacturers in establishing strong chemical contaminant specifications while ensuring regulatory compliance.


The demand for shelf-stable beverages continues to grow across categories, from juices and ready-to-drink teas to dairy-based and plant-based protein drinks. However, ensuring both safety and product integrity requires a clear understanding of processing methods, particularly as they relate to high-acid vs. low-acid beverages. This white paper outlines best practices for processing high-acid and low-acid beverages, common formulation challenges, and key factors for ensuring a safe, high-quality final product.


Testing complex botanical matrices using HPTLC goes beyond simply running a sample through a machine—it requires a deep understanding of both the plant material’s unique properties and the strengths and limitations of HPTLC. In this article, we’ll explore the intricacies of testing complex botanical samples using HPTLC, highlighting the challenges involved and how this technique can effectively overcome them—even in the most complex matrices.


(HPTLC) has established itself as the preferred analytical tool for identification of botanical samples. As with any analytical method, validating the HPTLC method is crucial to ensure that it produces reliable, accurate, and reproducible results. In this article, we will explore the process of HPTLC method validation, why it is necessary, and the critical parameters to consider.


Discover how increasing tariffs on agricultural commodities may heighten the risk of food fraud within global supply chains and explore key strategies to safeguard product integrity.


Sugar reduction is a growing priority in product development as consumers seek to address concerns related to sugar consumption. Removing sugar from a formulation presents several challenges beyond just replacing its sweetness. This article walks through considerations that must be made for a successful sugar reduction strategy.


Food safety risks in fruit and vegetable processing environments can come from many different sources. Agricultural items are inherently dirty products, which can introduce risk- including microbial pathogens- to a facility from the outside environment. If your Environmental Monitoring Program (EMP) and sanitation programs are not sufficient to control these risks, these products could be potentially cross contaminating other products that are subsequently processed in the facility. It is therefore imperative that we think about risks from both our incoming products and our processes when designing environmental monitoring programs.


This comprehensive guide dives into the considerations that must be taken when developing a nutritional bar product. Topics Include: • Better for You Bar formulation to meet consumer demands • Cost consideration when formulating a nutritional bar • Fiber, Sugar, and Protein ingredient functionality in a nutritional bar
Keywords: Blog Food NFL


Pilot-scale and small-batch production play a critical role in food, beverage, and dietary supplement development. These early stage runs allow companies to fine-tune formulations, troubleshoot production challenges, and test market viability before full-scale commercialization. However, without proper planning, pilot production can lead to costly setbacks. This paper outlines key considerations—including food safety, quality control, production troubleshooting, and packaging—to ensure your pilot runs set the stage for a successful market launch.



https://www.eurofinsus.com/food-testing