Study points to gut health potential for Xiasangju residues in hens

A newly published Animals study suggests that Xiasangju processing residues could do more than reduce waste: in laying hens, the by-product was associated with better production performance and shifts in intestinal inflammation and gut microbiota. The finding puts an unconventional ingredient, derived from the industrial processing of a traditional Chinese herbal formula, into the conversation around functional feed additives for poultry. (pubmed.ncbi.nlm.nih.gov)

Xiasangju is a traditional Chinese herbal formula made from Prunella spike, mulberry leaf, and chrysanthemum flower, and it has long been used in China in products such as herbal teas, granules, capsules, and oral liquids. As those products have expanded, so has the volume of residual plant material left after processing, creating a waste-stream problem as well as an opportunity for feed reuse. A 2023 piglet study and broader reviews of Xiasangju describe anti-inflammatory, antioxidant, antibacterial, and gut-modulating properties that make the residue biologically plausible as a feed ingredient, even if poultry-specific evidence has been limited until now. (pubmed.ncbi.nlm.nih.gov)

According to the study summary, the laying-hen trial assessed the residues’ nutritional composition, bioactive components, and functional effects, with reported improvements in production performance alongside modulation of intestinal inflammation and gut microbiota. That places the paper within a wider body of layer-nutrition research showing that plant products, fermented feeds, enzymes, probiotics, and other non-antibiotic additives can affect laying rate, gut integrity, immune markers, and microbial composition. Comparable studies in layers have reported similar interest in gut-mediated performance effects, though outcomes often depend on ingredient type, inclusion rate, age of birds, and production stage. (mdpi.com)

Outside this paper, the closest directly relevant evidence comes from other Xiasangju-residue work in livestock. In weaned piglets, dietary Xiasangju residues improved intestinal morphology, increased goblet cells, upregulated barrier-related markers such as Occludin and ZO-1, increased anti-inflammatory IL-10, reduced IL-1β, and shifted gut microbes toward potentially favorable taxa while reducing Escherichia coli abundance. Separate mouse work on Xiasangju oligosaccharides also found reduced colitis-related inflammation and microbiota changes. Those studies don’t prove the same mechanism in hens, but they support the idea that the residue contains bioactive compounds capable of affecting gut inflammation and microbial ecology. (frontiersin.org)

I didn’t find a press release or formal industry statement tied specifically to this laying-hen paper, but the broader industry and academic context is clear: interest in converting plant and processing by-products into value-added feed ingredients is rising, especially where additives may support gut health without relying on antibiotic growth promoters. Reviews of laying-hen microbiota emphasize that feed composition is a major lever shaping microbial communities, intestinal function, and downstream production outcomes. (journals.asm.org)

Why it matters: For veterinarians working with commercial poultry, this is less about one herbal residue and more about the direction of travel in layer nutrition. If the findings hold up, Xiasangju residues could represent a dual-purpose input: a sustainability play that diverts an industrial by-product from waste streams, and a health-oriented additive that may support intestinal resilience and production. But veterinary teams should be cautious. Herbal-processing residues can vary by source material, extraction method, and remaining active compounds, which complicates standardization, quality assurance, and ration formulation. Before widespread adoption, producers would need clearer data on dose response, long-term safety, egg quality, residue consistency, and cost-benefit under commercial conditions. (pubmed.ncbi.nlm.nih.gov)

There’s also a practical regulatory and formulation angle. A promising microbiome signal in a controlled study doesn’t automatically translate into a reliable feed ingredient across flocks, housing systems, or regional supply chains. Veterinary professionals and nutritionists will want to see whether the residue performs consistently in older hens, under disease or heat stress, and alongside other common feed additives. They’ll also want more clarity on whether benefits come from fiber fractions, polyphenols, oligosaccharides, or another bioactive component entirely. (mdpi.com)

What to watch: The next step is likely targeted validation, including larger commercial trials, compositional standardization of the residue, and more detailed mechanism work linking specific Xiasangju compounds to microbiota and inflammatory outcomes in layers. If those data emerge, this by-product could move from an interesting research finding to a more practical nutrition option. (mdpi.com)