Algae are increasingly used as feed ingredients for livestock, aquaculture and pet food. The EU feed regulatory framework is separate from, but closely parallel to, food law, with its own authorisation systems, labelling requirements and contaminant limits. This chapter covers the core framework applicable to algae as feed materials and feed additives, and addresses the boundary with food law that algae producers serving both markets must understand.

EU feed legislation follows a logic closely mirroring that of food law, with separate instruments governing safety, hygiene, labelling, contaminants and additives. The General Food Law (Regulation (EC) No 178/2002) applies to feed as well as food, establishing common definitions of “feed” and “food” and the principle that feed business operators, like food business operators, bear primary responsibility for safety. “Feed” and “food” are however distinct legal categories: an algal product placed on the market “for” feed use is subject to feed law, not food law, even if the same material could also be used for food.

Where the same producer or the same biomass batch is destined for both food and feed uses, both frameworks must be respected in parallel. There is no shortcut: a “food-grade” specification does not automatically mean the product complies with feed contaminant limits (which may be stricter or different in scope), and vice versa.

Regulation (EC) No 183/2005 of the European Parliament and of the Council of 12 January 2005 laying down requirements for feed hygiene, OJ L 35, 8.2.2005, p. 1. EUR-Lex

Relevance to algae: The Feed Hygiene Regulation is the direct feed equivalent of the Food Hygiene Regulation (EC) No 852/2004. It establishes requirements for feed business operators (FBOs) regarding premises, equipment, personnel, storage, and HACCP-based risk management. Key points:

• FBOs must register with (or, for certain higher-risk activities, obtain approval from) their national competent authority.
• HACCP obligations apply to feed manufacturing, though primary producers of feed are exempt in the same way as primary food producers.
• Algae producers supplying biomass for feed use must register as feed business operators and comply with the hygiene requirements applicable to their type of operation.

Regulation (EU) No 68/2013 of 16 January 2013 on the Catalogue of feed materials, OJ L 29, 30.1.2013, p. 1. EUR-Lex

Relevance to algae: The Catalogue lists feed materials by category and name, providing the standard nomenclature for use in feed labelling and trade. It is a labelling and nomenclature tool, not an authorisation list in the strict sense — the Catalogue creates a presumption that listed materials are acceptable for feed use, while non-listed materials may still be used but must be labelled with their product-specific description. Algae and algal products appear in the Catalogue:

• Category 7 (Other plants and algae, and products thereof) includes entries for seaweeds and algae, algae meal, algae oil, and various processed forms.
• The Catalogue's entries specify the feed material's description and any obligatory statements or labelling requirements.
• Using the Catalogue name does not override the requirement to comply with contaminant limits, feed hygiene, and (for novel feeds) the authorisation requirement described below.

Directive 2002/32/EC of the European Parliament and of the Council of 7 May 2002 on undesirable substances in animal feed, OJ L 140, 30.5.2002, p. 10. EUR-Lex

Relevance to algae: This Directive sets maximum levels for contaminants (heavy metals, mycotoxins, dioxins, pesticides) in feed materials and compound feed. Annex I lists the specific maximum levels, expressed per feed material as a percentage of moisture content. For algae as a feed material:

• Lead, cadmium and mercury limits apply; seaweeds' bioaccumulation potential for heavy metals means compliance testing is essential.
• Dioxin and PCB limits apply to all feed materials.
• No specific algae maximum levels exist for many contaminants; the general levels for “other feed materials” or “minerals” (where the algae is being used as a mineral supplement) apply.

Regulation (EU) 2022/2379 on statistics on agricultural input and output EURlex provides updated statistical context on feed use but does not alter the contaminant regulatory framework.

Regulation (EC) No 1831/2003 of the European Parliament and of the Council of 22 September 2003 on additives for use in animal nutrition, OJ L 268, 18.10.2003, p. 29. EURlex

Relevance to algae: Feed additives are regulated under a separate, dedicated authorisation system under this Regulation, distinct from the Catalogue of Feed Materials. An algal product marketed for a specific functional effect in the animal (not just for nutritional contribution) is likely to be classified as a feed additive requiring authorisation. Key categories relevant to algae:

• Colourants — astaxanthin (predominantly from Haematococcus pluvialis or synthetic) is used in aquaculture feed (salmon, trout) and poultry feed to achieve the characteristic pigmentation; it must be authorised as a feed additive under Regulation (EC) No 1831/2003 and is subject to specific conditions of use and maximum levels per kg of feed.
• Nutritional additives (vitamins, trace elements, amino acids, and their analogues) — if an algal product is being used specifically as a source of a declared nutrient provided in standardised form, it may cross into the feed additive category.
• Technological additives (emulsifiers, antioxidants, preservatives used in feed) — algae-derived substances used for technological purposes in compound feed may fall into this category.
• Sensory additives (colourants for food-producing animals where pigmentation of the food is the purpose) — this is the principal category under which astaxanthin from algae is authorised.

Authorisations under Regulation (EC) No 1831/2003 are granted for a specific substance, for use in specific animal species/categories, at specified inclusion levels. The EU Register of Feed Additives maintained by DG SANTE lists current authorisations. An algal feed additive without a current authorisation may not be used, regardless of its history of use as a food ingredient.

Regulation (EU) 2015/2283 on novel foods and Regulation (EC) No 767/2009 on the placing on the market and use of feed EURlex together establish that feed materials with no history of significant use within the EU before the respective cut-off date may require an assessment and notification. The novel feed framework is less fully developed than its food equivalent, but producers of genuinely new algal species or novel algal fractions for feed use should seek guidance on whether a novel feed assessment is required.

Where algae are grown on substrates derived from animal-origin materials — manure, digestate containing animal by-products, fish processing water — the resulting biomass and any derived feed material must be assessed against the Animal By-products Regulation (EC) No 1069/2009. ABP-derived feed may only be used in animal nutrition under specific conditions. See Animal By-products for the full framework.

Regulation (EC) No 999/2001 on the prevention, control and eradication of certain transmissible spongiform encephalopathies, as amended by Regulation (EU) 2021/1372, OJ L 295, 20.8.2021, p. 1. EUR-Lex

Relevance to algae: The prohibition on recycled animal proteins (RAP) in feed for farmed animals has been partially relaxed by Regulation (EU) 2021/1372, which re-authorises insect protein and single-cell proteins derived from certain substrates for use in aquaculture and poultry feed. This is peripherally relevant to algae in systems where algae are co-cultivated with or fed on organic waste streams: the TSE feed ban framework defines which organic substrates may and may not be used to produce biomass intended for animal feed, and algae producers using waste-stream nutrient sources should verify that their production substrates do not cause the resulting biomass to fall under TSE feed restrictions.

Regulation (EU) 2023/2419 of the European Parliament and of the Council of 18 October 2023 on the labelling of organic pet food, OJ L, 2023/2419, 27.10.2023 EURlex lays down the requirements for the pet food to be labelled with EU organic logo.

Relevance to algae: Algae have become popular as an ingredient in many pet food preparations.

A commercially important specific application is the use of algae-derived ingredients (algal meal, algal oil, carotenoids) in aquaculture feed. This market is growing rapidly as the sector seeks to reduce dependence on fishmeal and fish oil. The regulatory framework for aquaculture feed is the same as for other animal feed under the instruments described above; however, in practice the key commercial requirements are:

• Authorisation of astaxanthin and other carotenoids as feed additives for salmonid and other fish species.
• Compliance with heavy metal contaminant limits in algal meal used as a fishmeal replacement.
• HACCP compliance for the feed manufacturing step.

• Register as a feed business operator if placing algae on the market as a feed material — registration is required under Regulation (EC) No 183/2005 and is typically the first regulatory step.
• Use the Catalogue of Feed Materials nomenclature on labels and in trade documentation to ensure clarity and compliance with feed labelling requirements.
• Test for heavy metals, dioxins and other Directive 2002/32 contaminants before placing algal biomass on the feed market; contaminant testing is typically required by buyers as part of quality assurance and may be checked at official control inspections.
• Determine whether your product is a feed material or a feed additive — if you are marketing any specific functional or physiological effect in the animal, you may be in the feed additive category, which requires a formal authorisation before market access.
• Check the ABP and TSE frameworks if growing on organic waste streams before supplying for animal feed use.
• For export to non-EU markets, note that feed authorisation systems (USA's Generally Recognised as Safe/GRAS framework, etc.) are entirely separate from the EU system and must be navigated independently.

See also: Food | Production, Processing and Hygiene — General | Animal By-products | Waste, Wastewater, Nutrient Recovery | Aquaculture and Wild Harvesting

Last reviewed: June 2026.