A review of current and potential applications of macroalgae to equine veterinary science.
Authors: Warren P, Mc Crudden D, O'Reilly S, Mc Eleney C
Journal: Journal of equine veterinary science
Summary
# Editorial Summary: Macroalgae Applications in Equine Veterinary Science Warren and colleagues conducted a comprehensive literature review examining macroalgae's current and potential roles in equine health, synthesising evidence from both equine and non-equine research to assess the validity of bioactive claims made by seaweed supplement manufacturers. Macroalgal compounds—particularly alginates and fucoidans—demonstrate antioxidant, anti-inflammatory and anthelmintic properties in various species, alongside a broad micronutrient and macronutrient profile that supports gut microbiome health and gastrointestinal mucosal integrity. Whilst substantial research supports these benefits in non-equine animals, equine-specific evidence remains limited, creating a significant gap between widespread commercial supplementation practices and robust clinical data. The review highlights macroalgae as a promising source of naturally occurring antimicrobial and anthelmintic alternatives at a critical juncture where drug resistance threatens conventional treatment protocols under the One Health framework. Practitioners should recognise both the potential welfare benefits and the current need for properly designed equine trials to establish effective dosage protocols, whilst regulatory bodies must develop oversight mechanisms to ensure product safety and consistent quality in what remains a relatively unregulated supplement sector.
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Practical Takeaways
- •Macroalgae-based supplements show promise as natural alternatives to antimicrobial and anthelmintic drugs given emerging resistance concerns, but evidence in horses specifically remains limited
- •Seaweed's nutritional profile and bioactive compounds may support equine gastrointestinal health and welfare, though manufacturer claims require further substantiation through rigorous research
- •Until regulation and standardization improve, veterinarians should exercise caution with macroalgae supplements and recommend only those with documented safety profiles
Key Findings
- •Macroalgae contain bioactive compounds including alginates and fucoidans with reported antioxidant, anti-inflammatory, and anthelmintic properties in non-equine species
- •Seaweed provides broad spectrum of macro and micronutrients that may support healthy gut biome and act as mucosal protectant in equines
- •Current literature indicates potential applications of macroalgal compounds in veterinary medicine, but further research is needed to quantify efficacy and optimal dosages
- •Regulatory oversight is necessary to ensure biosafety standards for macroalgae-based supplements and feedstuffs