Inulin for Fish: Aquaculture Research

Inulin for fish is a natural prebiotic derived from Jerusalem artichoke that supports gut health, metabolism, and microbiota balance in aquaculture. 

Studies highlight the beneficial role of inulin, a plant-derived prebiotic, in improving gut health and metabolic status in Nile tilapia (Oreochromis niloticus), especially under nutritionally challenging conditions such as high-carbohydrate diets.

Key benefits of inulin include improved lipid metabolism, reduced hepatic fat accumulation, lower plasma triglyceride and glucose levels, and enhanced short-chain fatty acid (SCFA) production, supporting both intestinal and systemic health.

Effects of Inulin for fish on Metabolic Health and Gut Microbiota

• Wang et al. (2021) demonstrated that dietary inulin supplementation significantly alleviated metabolic syndrome in Nile tilapia fed high-carbohydrate diets.

• Inulin improved gut microbiota composition, increasing beneficial bacteria and SCFA production, which is crucial for gut and metabolic health.

• Ou et al. (2024) confirmed that dietary macronutrients strongly influence gut microbiota in tilapia and that prebiotics like inulin offer a promising tool to maintain microbial balance, support intestinal homeostasis, optimize nutrient utilization, and strengthen immunity.

Comparison with Other Gut Modulators

• While mannan oligosaccharides (MOS) (Wang et al., 2022) and sodium acetate (Li et al., 2020) can also mitigate the adverse effects of high-carbohydrate diets, inulin stands out for its dual role in both metabolic regulation and microbiota enhancement.

• Probiotics like Rummeliibacillus stabekisii (Tan et al., 2019) provide benefits, but inulin as a prebiotic is non-living, more stable, and broadly applicable in aquaculture feed

Conclusions

• Inulin supplementation in Nile tilapia diets reduces metabolic stress caused by high carbohydrate intake.

• It enhances gut microbiota composition, favoring beneficial bacteria and SCFA producers.

• Inulin supports intestinal and systemic health, positioning it as a functional feed additive in aquaculture.

These findings support broader use of inulin in fish farming to promote growth, improve resilience, and reduce metabolic disorders, especially under intensive feeding strategies.

References

• Wang T, Zhang N, Yu XB, Qiao F, Chen LQ, Du ZY, Zhang ML. Inulin alleviates adverse metabolic syndrome and regulates intestinal microbiota composition in Nile tilapia (Oreochromis niloticus) fed with high-carbohydrate diet. Br J Nutr. 2021 Jul 28. https://pubmed.ncbi.nlm.nih.gov/33046150/
• Ou W, Guo Z, Pan Y, Huang K, Ma Y, Qin Z. Advances in the Effects of Dietary Macronutrients on the Gut Microbiota of Tilapia (Oreochromis spp.). Microorganisms. 2024 Mar 8. https://pubmed.ncbi.nlm.nih.gov/38543594/
• Wang T, Wu HX, Li WJ, Xu R, Qiao F, Du ZY, Zhang ML. Effects of dietary mannan oligosaccharides (MOS) supplementation on metabolism, inflammatory response and gut microbiota of juvenile Nile tilapia (Oreochromis niloticus) fed with high carbohydrate diet. Fish Shellfish Immunol. 2022 Nov. https://pubmed.ncbi.nlm.nih.gov/36179963/
• Li M, Hu FC, Qiao F, Du ZY, Zhang ML. Sodium acetate alleviated high-carbohydrate induced intestinal inflammation by suppressing MAPK and NF-κB signaling pathways in Nile tilapia (Oreochromis niloticus). Fish Shellfish Immunol. 2020 Mar. https://pubmed.ncbi.nlm.nih.gov/31730927/
• Tan HY, Chen SW, Hu SY. Improvements in the growth performance, immunity, disease resistance, and gut microbiota by the probiotic Rummeliibacillus stabekisii in Nile tilapia (Oreochromis niloticus). Fish Shellfish Immunol. 2019 Sep. https://pubmed.ncbi.nlm.nih.gov/31202962/
• Furuya WM, Cruz TPD, Gatlin DM 3rd. Amino Acid Requirements for Nile Tilapia: An Update. Animals (Basel). 2023 Mar 1. https://pubmed.ncbi.nlm.nih.gov/36899757/