Where to buy spirulina.

Drying: Spray-dried

Certified organic, third-party tested, widely available in health shops and online, mid-price. Good entry point: you get reliable quality without committing to a premium budget.

Drying: Spray-dried

The easiest brand to find in UK supermarkets and health shops. Publishes a CoA on request, consistent supply, and the 200g bags are a practical first format.

Phycocyanin: 14–18%

Drying: Ocean-Chill (low-temp)

The benchmark. 40+ years of continuous operation in Kona, Hawaii, NSF Sport certified, batch-level CoAs available. If you want the most documented spirulina on the market, this is it.

Phycocyanin: 14–16%

Drying: Spray-dried (controlled)

Same Hawaiian growing conditions as Cyanotech, slightly more accessible pricing. The 454g powder is good value at the premium tier.

Phycocyanin: Over 18%

Drying: Low-temp vacuum

Italian closed-system tubular photobioreactor — the highest phycocyanin numbers we've seen from any commercial producer. Small-batch, genuinely exceptional product.

Phycocyanin: 14–18%

Drying: Ocean-Chill (low-temp)

NSF Certified for Sport — the certification that competitive athletes need to verify no banned substances. Tablets make hitting 6 g/day convenient.

Phycocyanin: 14–16%

Drying: Low-temp spray

High phycocyanin, serious testing programme, better price-per-gram than Hawaiian options. Good choice for athletes taking higher daily doses (4–6 g/day) on a budget.

Phycocyanin: 14–18%

Drying: Ocean-Chill (low-temp)

The most tested spirulina in the world. Historically excellent heavy-metal results from clean Pacific water. Batch-level CoA available — essential during pregnancy.

Phycocyanin: 16–18%

Drying: Low-temp

Closed-system French producer with full organic certification and published third-party testing. European regulatory standards; transparent about batch data.

Drying: Spray-dried

The most affordable brand with genuinely accessible third-party testing. NOW's internal and third-party testing programme is more rigorous than most budget brands. A good option if cost is the primary constraint.

Drying: Spray-dried

Certified organic, third-party tested, Amazon-available in large formats. Not the highest phycocyanin, but a clean supply chain at a competitive price point.