For many years, synthetic growth promoters have been the main method for helping fish grow rapidly in intensive aquaculture. However, this trend is rapidly changing by 2026 due to more stringent regulations, such as the ban on certain synthetic antioxidants by the European Commission in 2022, and the presence of a growing problem of antibiotic resistance. Therefore, the aquaculture industry is looking for safer alternatives to synthetic growth promoters.
As a result, natural bio-based aquafeed enhancers are becoming more and more widely used. These natural, bio-based aquafeed enhancers are made from natural products including the microalgae and microbial metabolites, and are being demonstrated as environmentally responsible alternatives to the traditional aquafeed enhancers by providing equivalent or better rates of growth in fish and redefining efficiency in the aquaculture sector.
The shift towards biological solutions:
Conventional growth promoters in aquafeeds have traditionally relied on antibiotics or strong chemical antioxidants (like BHA and BHT) to improve performance of the feed and maintain its quality as well. While these substances work well but they’re likely to leave a residue that can cause concerns about food safety, exportability, and consumer health.
Conversely, the probiotics, phytogenic plant extracts, and organic acids are examples of Natural Growth Promoters (NGPs) which are used in bio-based aquafeed enhancers. According to a 2025 review that was published in Frontiers in Marine Science, these natural substitutes provide a clean-label solution that works like an equivalent or even better than chemical inputs without the negative effects that chemical residues have on the environment and regulations.
The shift towards biology-based aquaculture fish feeds is being driven by a few important categories of natural enhancers that provides performance and sustainability advantages simultaneously.
Microalgae & Natural Carotenoids: Astaxanthin which is a strong antioxidant is known to be abundant in Haematococcus pluvialis and Spirulina. According to research findings released by MDPI (2025), natural astaxanthin can significantly outperform synthetic astaxanthin against the oxidative stress, which increases fish survival rates by enabling them to withstand the high temperatures and transportation stress.
Microbial Metabolites (Postbiotics): Recent nutritional research has shifted focus from live probiotic cultures to postbiotics which includes the bioactive compounds such as enzymes, organic acids, and other metabolites produced during microbial fermentation. A study published in Animal Microbiome reported that metabolites derived from Lactobacillus plantarum enhanced muscle development in Nile tilapia while also helping limit excessive fat deposition.
Insect-Based Functional Meals: Black Soldier Fly Larvae (BSFL) meal is turning out to be something more than just an alternative protein source. It is also rich in lauric acid and antimicrobial peptides, which help in maintaining gut health. Studies recorded by PMC (2025) show that the substitution of up to 50% of conventional fishmeal with BSFL meal resulted in an improvement of up to 10% in feed conversion efficiency in African catfish.
These bio-based inputs are thus changing the way aquafeed is made and proving that nature-based solutions can help in achieving efficiency, robustness, and profitability simultaneously.
The use of bio-based aquafeed enhancers has transcended the boundaries of environmental goodwill and has become a financially sound decision.
Improved Export Access: The EU and North America’s top markets are enforcing strict levels of synthetic residues. Bio-enhanced fish have no problem meeting these standards and actually receive a 12-15% price premium due to their clean label.
Circular Resource Use: Biological enhancers are produced through solid-state fermentation (SSF) in agro-industrial by-products such as fruit peels or rice bran. This circular approach has decreased the cost of functional ingredients, which were the most expensive component of aquafeed.
Reduced Emissions and Waste Discharge: Nutrient losses are lower in feeds that are easier to digest biologically. It has been shown that probiotic-enriched diets can reduce nitrogen and phosphorus emissions into fishponds by as much as 20% and prevent algal blooms that can cause massive fish mortality.
Taken together, these benefits illustrate that bio-based enhancers offer a unique value proposition of higher profits and a cleaner environment, making them a smart upgrade for the modern fish farm.
Natural and bio-based additives are projected to grow at the fastest CAGR in the aquafeed market, which is projected to reach $74 billion by 2026. This represents a paradigm shift in how performance is achieved, rather than a trend. The industry is able to sustain growth rates, meet regulations, and safeguard ecosystems by shifting from synthetic, force-mass-based solutions to biologically precise nutrition.
The message to farmers is clear that biological inputs are now a foundation for a stronger and more resilient business that meets the global requirement for sustainable and safe seafood, rather than an alternative.
