ISSUE FOCUS FEED & ADDITIVE MAGAZINE November 2025 53 reducing AGPs on the swine farm presents new challenges for producers striving to maintain performance in young piglets. That’s where Presan-FX shows strong potential. A 42-day study conducted in China compared piglets fed AGP-supplemented diets, those receiving Presan-FX, and a negative control group, all under reduced-zinc conditions. While no significant differences were found in final body weight, feed intake, or growth rate across the groups (Table 3), Presan-FX stood out in its effect on gut fermentation. It significantly increased the concentrations of VFAs, such as acetic and propionic acid, in both the caecum and colon. Butyrate levels were also higher in the Presan-FX group, supporting better gut lining health and nutrient absorption (Figure 2). Stress is a recognised part of swine production, particularly around weaning, when gut health is most vulnerable. Presan-FX stabilizes microbial populations and may boost gut wall integrity during this critical period. PROVEN TO ENHANCE PIG PERFORMANCE By increasing VFA production and supporting nutrient absorption, Presan-FX supports growth while reducing the need for antibiotic interventions. These benefits contribute to improved pig production, regardless of climate zone or regulatory landscape. Data from 23 trials representing five countries and covering every phase of pig production shows that Presan-FX has demonstrated consistent improvements in key production metrics including faecal consistency, energy metabolism, and economic return. For producers seeking science-backed, antibiotic-free solutions, Presan-FX is a smart investment in sustainable piglet performance. Negative control Positive control (AGP) Presan®-FX Table 3. Growth performance of weaned piglets in three treatment groups Body weight, kg Average daily gain, g/d Average daily feed intake, g/d Feed conversion ratio, kg/kg 23.95 400 639 1.60 24.02 406 661 1.63 24.14 407 659 1.62 About Giseli Heim As a veterinarian, Giseli Heim holds a master’s degree in Veterinary Science (Swine Reproduction – Brazil) and a PhD in Animal Science (Swine Nutrition – Ireland). She has been working for Trouw Nutrition for almost six years, starting from Global Marketing Swine, joining Nutreco Africa as Swine Specialist and finally finding her passion in the Selko Feed Additives, Gut Health Team, as Global Product Manager Gut Health. She has worked at Cargill (Spain), Orffa (Netherlands) and IDEXX (Netherlands). She is originally from Brazil and lived in Ireland, Spain and finally The Netherlands. Photo: Thammachak Sotiya | Shutterstock
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