Polygraph

Spirulina contains phycocyanin, which accounts for approximately 20% of its weight.

Posted by The Health Ranger Report, Checked

Polygraph verdictMixed
Sources
1 contradict3 support1 context
Said
1 time·
Confidence
60%
The Health Ranger ReportAug 14, 2026
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Sources confirm spirulina contains phycocyanin and place it within roughly 12–25% of biomass or dry weight, so the claimed 20% falls inside the reported range. However, Examine reports about 20% only for freeze-dried or sun-dried spirulina and about 4% for oven-dried, so the figure depends on the drying measure.

A detail. The sources confirm the gist; the verdict faults a detail such as a date, number or wording.

What was said

… Spirulina is amazing for a number of reasons. One is because it contains very high concentrations of phycocyanin, which is the pigment that makes it blue-green. If you have high levels of phycocyanin that you take in, that phycocyanin, which is about 20% of spirulina by weight, that phycocyanin itself can neutralize the most dangerous DNA-damaging free radicals known to exist in biochemistry. …
The Health Ranger Report · · from the transcriptPost →

What we found

Contradicts. Examine reports that C-phycocyanin is about 20% of dry weight only when spirulina is freeze-dried or sun-dried, and only about 4% when oven-dried, so the figure depends on processing.[2]

Supports. A primary NIH/PMC article reports C-phycocyanin at up to 16%–24% of dry weight, which brackets the claimed 20%.[1]

Supports. A Springer review gives phycocyanins as 12–20% of spirulina and elsewhere as 15–25% of its biomass, and a nutrition paper says phycocyanin can constitute up to 20% of dry weight.[3][4]

Context. The FAO extract assessment reports phycobiliprotein concentrations of 15–30 g/100 g in powder products, consistent with a wide range depending on product form.[5]

Sources

5 sources: 1 primary, 4 not rated

  1. 1Spirulina as a Multifunctional Ingredient - PMC - NIHpmc.ncbi.nlm.nih.gov · primary source · cited for: supports
  2. 2Research Breakdown on Spirulinaexamine.com · not rated · cited for: contradicts
  3. 3Spirulina: a superfood – nutritional insights, advancement in ...link.springer.com · not rated · cited for: supports
  4. 4Nutrition and Health Functions of Spirulina and its ...iopscience.iop.org · not rated · cited for: supports
  5. 5SPIRULINA EXTRACT, Chemical and Technical Assessment ...openknowledge.fao.org · not rated · cited for: context

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