Starting a commercial spirulina operation: regulations, HACCP, and economic reality

Regulatory framework: UK and EU

Any business selling food (including spirulina) must register as a food business operator with the local authority environmental health department — free registration, required at least 28 days before starting trade
Premises used for production must meet food hygiene requirements (Food Hygiene Regulations 2006, England and Wales; equivalent devolved legislation in Scotland and Northern Ireland)

Spirulina has a complex regulatory status in the EU. Under EU Novel Food Regulation 2015/2283, foods without significant EU consumption history before May 1997 require Novel Foods authorisation. Spirulina (Arthrospira platensis and A. maxima) has been marketed in the EU since before 1997 and has received Novel Foods status on the Union List (Commission Regulation EU 2017/2470) — it is an authorised traditional food from a third country.
UK retained Novel Foods regulation post-Brexit. Spirulina appears on the GB Novel Foods Authorised List. As an existing authorised product, commercial sale is permitted without new authorisation.
Key constraint: the authorisation is for “dried Arthrospira platensis” — if you are selling live spirulina culture or wet paste for consumption, the regulatory status requires specific advice from a food law consultant.

Commercial spirulina producers must implement a Hazard Analysis and Critical Control Points (HACCP) system:

Hazard identification:Biological (bacterial contamination, rotifers, other cyanobacteria producing microcystin), chemical (heavy metals from water source, fertiliser contamination), physical (equipment contamination).
Critical control points (CCPs):Incoming water quality testing; culture pH monitoring (≥9.5 to inhibit bacterial growth); drying temperature control; finished product testing before release.
A trained HACCP facilitator can help produce the required documentation. Many local environmental health departments offer free food business advisory visits.

Commercial spirulina must be batch-tested before sale. Minimum requirements:

Heavy metals:Lead (<0.5 mg/kg food), arsenic (<0.1 mg/kg for spirulina — EFSA recommends lower limits for algae), cadmium (<0.05 mg/kg), mercury (<0.1 mg/kg). EU Regulation 2023/915 sets maximum levels for certain contaminants.
Microcystin:EU has a guidance value of 1 µg/g dry weight total microcystins. No mandatory legal limit in UK/EU yet but rapidly approaching mandatory status. Accredited labs offer LC-MS/MS microcystin panel testing.
Microbiology:Total viable count, E. coli, Salmonella (absent in 25 g), Staphylococcus aureus.
Phycocyanin content:Not mandatory but commercially valuable — spirulina commands premium pricing when phycocyanin content is documented (target: >10% C-phycocyanin by weight).
UK-accredited laboratories (UKAS accreditation) that offer spirulina-relevant panels: Eurofins, SGS, Fera Science, LGC Sciences. Cost per batch: £200–600 depending on panel breadth.

Name: “Dried spirulina” or “Spirulina powder” (Arthrospira platensis or A. maxima — species must be declared under Novel Foods rules)
Nutrition declaration (per 100 g and per stated serving): energy (kJ/kcal), fat (saturated), carbohydrate (sugars), fibre, protein, salt
Any health claims must be authorised under EU/UK nutrition and health claims regulation. Generic claims about spirulina and health are not permitted without authorised claims. Most producers use factual compositional statements instead.
Best before date based on stability testing

Small commercial spirulina production economics at scale:

Production cost(100 L raceway, optimal summer production, dried and packaged): approximately £15–30 per kg dry weight (nutrients, energy, water, labour, packaging, batch testing amortised). This is the all-in cost, not just nutrients.
Retail price:Quality UK spirulina retail at £80–150 per kg dried powder. Premium certified organic or high-phycocyanin spirulina: £150–300/kg.
Margin:Gross margin at small scale is potentially attractive — but production volume at 100 L outdoor growing (seasonal UK) is limited. A productive summer season might yield 3–8 kg dried spirulina. At £100/kg retail, this is £300–800 revenue. At £20/kg production cost, gross profit is £240–640 before overheads and fixed costs.
Viable niche:Local markets, farm shops, and direct-to-consumer online sales with a “locally grown” premium story. Wholesale supply to food manufacturers is typically not viable at small scale due to batch testing overhead.