J. David Legan, PhD
Director of Science
David earned his Ph.D. in Food Technology from the University of Reading in the UK by modeling the ecology of mixed microbial populations, and then moved to Campden BRI in a variety of microbiological food safety research and client service roles. During that time, he was project lead for the Bacillus component of the UK’s pathogen modeling program. He moved again to Nabisco Research in New Jersey where he ran the corporate microbiology lab and developed a program of preservation technology development and microbial modeling. After the Kraft Foods acquisition, he moved to Chicago to work on Food Safety and Preservation research, and through modeling and validation studies:
- Optimized Oscar Mayer’s use of lactate and diacetate and their naturally cultured alternatives as Listeria-control agents in Ready to Eat meats
- Specified process conditions central to Oscar Mayer’s commercial launch of High Pressure Pasteurization of naturally cured RTE meats
David had responsibility for the Kraft cultures R&D group, developed a partnership to explore microwave sterilization leading to several patents, and led a program that developed an internal proprietary natural antimicrobial commercialized in several Kraft products. Technologies from his group supported approximately $4 billion in annual sales.
After years as a microbiology "client", he is now back in the "provider" role as Director of Science at Eurofins Microbiology Laboratories, Inc., by way of the Covance Food Solutions group based in Madison, WI, which he joined in 2016. In this role, he ensures appropriate method validation, explores new testing technologies, and fields multiple complicated food microbiology questions.
Products that his team has evaluated or developed and launched include:
- The 3M MDS platform in the Madison microbiology laboratory
- Flow cytometry for enumeration of probiotics
- Strain-level confirmation of probiotic identification using the polymerase chain reaction (PCR)
- Next-generation sequencing using the Oxford Nanopore Technologies GridION sequencing platform for microbial identification and microbiome analysis
Below are resources from David:
Compendial methods used for detecting sulfur dioxide and sulfites are prone to challenges, including false positives in sulfur-rich matrices. Eurofins Food Chemistry Testing Madison, Inc. offers a solution. Click to read about the innovative LC-MS method for determining sulfur dioxide and sulfites in food products.
The world of wellness is experiencing a “gummification” wave, which includes using gummies to deliver APIs as a replacement for traditional forms like pills and syrups. But this matrix doesn't come without challenges. Click to read how you can ensure the effectiveness of alternative forms like gummies, chews, drink mixes, and lozenges.
Contaminants like ochratoxin A in botanicals and aflatoxins in raw materials pose serious risks to product quality and consumer health. Targeted mycotoxin testing for supplements is critical to meet global compliance standards and protect your brand from costly recalls or regulatory action. Click to learn more.
Pesticide testing is a vital part of maintaining the safety, quality, and regulatory compliance of food products. For QA and food safety managers, understanding the right time to test for pesticides and how to navigate the complex regulatory landscape is crucial for keeping consumers safe and avoiding costly compliance issues. Click to read our guide on pesticide testing to learn more.
When it comes to raw material testing, choosing the right method isn't just a box to check. It's the foundation of your quality control program. So, when should monograph tests be used? And why do they matter? Read our blog to learn more.
Dietary fiber testing in supplements is a highly complex process, requiring careful selection of testing methods customized to specific fiber sources. Many companies may struggle with choosing the right dietary fiber testing methodology, often defaulting to the most convenient or cost-effective option without realizing the implications. This blog will review common types of dietary fiber sources used in supplements along with strategies to ensure accurate and timely results.
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.
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.
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.
