Brands & producers
21 spirulina brands, evaluated.
Independent reviews with no paid placements. Every brand listed here meets our minimum testing bar — and we say clearly why some are better than others.
Brand recommendations on the internet about spirulina are mostly worthless — paid placements in “top 10” round-ups, affiliate-optimised lists with no disclosed methodology, and the opposite problem of nameless forum posts that praise obscure brands without any verifiable testing data.
This directory is our attempt at a calmer alternative: a transparent set of criteria, a growing list of producers we’ve watched over time, and explicit honesty about what we don’t know.
Our five evaluation criteria
Every brand in this directory meets or exceeds these bars. Brands that fail even one criterion are not listed.
01
Published, recent third-party testing
A Certificate of Analysis from an accredited lab, dated within the last 12 months, identified to a batch number that matches what's on the shelf. This is non-negotiable.
02
Transparency about origin
We want to know which farm or which region the product comes from — to a specific named source, not 'imported' or 'sustainably sourced'.
03
A named drying method
Spray-dried, vacuum-dried, low-temperature, or air-dried. Each has trade-offs; what matters is that the producer says which one they use.
04
A published phycocyanin percentage
Most producers don't print this. The ones who do are signalling confidence — and giving you the single best signal of freshness and gentle processing.
05
Editorial restraint
We don't trust brands that promise miracles. A producer that says 'a complete protein with iron and B-vitamins' has more credibility than one that says 'detoxes your body and boosts your immune system'.
What we don’t cover
- Multi-level marketing (MLM) brands. We have no editorial interest in their model.
- Brands that decline to publish a CoA. Whatever else they may be, they’re below our minimum bar.
- Brands whose current marketing makes therapeutic medical claims. The legal and editorial issues are too tangled to engage with.
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