By: Animistic Team - December 3rd, 2025
Attending MODNUT 2025 in Switzerland was a defining moment for me as a nutrition modeler. A conference devoted entirely to modeling nutrition and metabolism, what could be better? For years, I’ve worked to bridge the gap between animal biology and mathematical models, and to finally spend a week surrounded by others who live in that intersection was energizing, and it is exactly why I wanted to share this MODNUT 2025 Conference Recap.
Among all the exceptional presentations, Dr. Neil Ferguson’s session: “A Method to Incorporate Gut Health Modifiers into a Mechanistic Pig Growth Model” stood out. His work captured exactly why I’ve long believed that all diseases start in the gut and that if we’re serious about sustainable productivity, modeling must also account for where it all starts: the gut.
Dr. Ferguson opened modestly, saying he wanted “to really introduce some concepts, maybe some ideas around a proposed method and just to throw out the ideas, see how it works.” What followed was an elegant framework that gave mathematical form to gut function.
He described three interconnected components: microbiota, gut-barrier integrity, and immunomodulation. Together, they determine digestion, absorption, and the animal’s ability to express its genetic potential.
“In reality, there are significant environmental, social, dietary, and nutritional effects that prevent the animal from actually expressing its potential,” he noted as a reminder that biological context always constrains genetic possibility.
Ferguson’s framework allows gut modifiers, such as acidifiers, prebiotics, or trace minerals, to be modeled not as feed additives, but as biological influencers. By improving gut integrity or balancing the microbiome, nutrients can be redirected from immune maintenance toward lean tissue deposition. For modelers like me, that’s a game-changer, it means we can quantify how health itself becomes a growth variable.
To operationalize this, his team introduced three scoring systems:
AMI (Antimicrobial/Microbiota Index)
IMI (Immunomodulation Index)
Each runs from 0 to 100 (or up to 200 for immune response) and acts as a biological dial to quantify additive impact. Crucially, when additive combinations push the total above 100, the model caps further benefit.
That may sound simple, but it mirrors the law of diminishing returns in biology, reminding us that adding more does not mean doing better. It’s a mathematical safeguard against overinterpretation.
Ferguson also discussed validation, comparing predicted outcomes with real-world data from nursery and finisher pigs. The predictions held up well despite inevitable biological variation, which reinforces the model’s practical value.
“It allows us now to actually use in silico testing of new additives before we even add the basic manifestation process,” he explained. An exciting step toward smarter, faster R&D pipelines.
While Dr. Ferguson’s talk deeply resonated with my passion for gut biology, the insights I’ve gathered for this MODNUT 2025 Conference Recap revealed a treasure trove of perspectives across disciplines.
The ‘Nutrients, Functional Biology and Feeding Systems’ sessions expanded the conversation from gut-centric to whole-animal integration. One presentation on nutrient–gene interactions showed how dietary components reshape transcriptomic pathways influencing metabolism and immunity, turning nutrition from static formulation into dynamic regulation.
Another explored adaptive feeding systems, where real-time sensor data on temperature, activity, and intake are continuously fed back into digital models to fine-tune diets. That convergence of data and physiology is the future of precision feeding.
Nutrients are not just energy carriers; they are molecular signals. Capturing those signaling roles, how a vitamin or fatty acid triggers cellular communication, is the next frontier in nutrition modeling. MODNUT’s discussions gave me optimism that this complexity can indeed be translated into code.
Across sessions, one theme echoed, models must remain biologically faithful. Equations are only as good as the physiology behind them.
Attending this conference wasn’t just professional development, it was a reconnection with purpose and a moment that shaped this MODNUT 2025 Conference Recap. It reminded me that our work as modelers isn’t about abstraction; it’s about revealing biology through mathematics.
I am grateful to the Nutreco Digital Team for hosting myself and such an intellectually stimulating event. Their commitment to advancing digital nutrition through open science was evident.
And to my colleagues at Animistic, thank you for making this trip to Switzerland possible. Your support reflects a company culture that values knowledge, innovation, and global collaboration.
