ARTICLE 62 FEED & ADDITIVE MAGAZINE March 2026 Marine macroalgae are gaining attention in animal nutrition as sustainable, multifunctional feed additives aligned with climate goals and evolving consumer expectations. While still a niche market, their applications span methane mitigation, immune and gut health support, antioxidant protection, mineral supplementation, palatability enhancement, and fiber provision. Understanding the current market dynamics, technical limitations, and innovation pathways is essential to assess how marine macroalgae can transition from specialized use to broader adoption in global feed systems. In the quest for sustainable and functional animal nutrition solutions, marine macroalgae have emerged as a promising category of feed additives. Though still considered a niche segment, macroalgae are steadily gaining traction due to their natural origin, multifunctional benefits, and alignment with environmental and consumer trends. This article explores the current market for marine macroalgae in animal nutrition, highlights key applications, delves into the technical challenges inherent to algae-based products, and outlines exciting research directions poised to unlock their full potential. THE CURRENT STATUS OF MACROALGAE USE IN ANIMAL FEED Macroalgae, or seaweeds, are not yet widely adopted in mainstream livestock feed but are carving out growing niches. Their use is more advanced in ruminants and aquaculture, while experimental applications in monogastrics like swine and poultry, as well as companion animals, are gaining interest. Unlike bulk feed materials such as cereals or forages, macroalgae are primarily employed as additive-level ingredients, targeting specific functional benefits rather than providing major nutritional energy. Despite the current limited scale, the global market for macroalgae in animal feed is estimated at around USD 70 to 120 million in actual sales today, with future projections soaring to approximately USD 1.25 billion* in 2030 as sustainability goals, consumer demands for natural ingredients, and regulatory pressures intensify. The market is segmented into six primary application areas: methane mitigation, immune modulation and gut health, antioxidant support, mineral supplementation, flavor and palatants (particularly in aquafeed), and sustainable fiber sources (*Global seaweed new and emerging markets report – 2023 – World Bank). FUNCTIONAL APPLICATIONS AND TARGET SPECIES Methane Mitigation is a flagship application for macroalgae, especially in ruminants. Certain red alMARINE MACROALGAE IN ANIMAL NUTRITION: Current Market Landscape, Technical Challenges, and Future Potential Ewenn Helary CEO NUQO Feed Additives
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