Spirulina
Spirulina is a blue-green microalgae (cyanobacterium) that has been consumed as a nutrient-dense food source for centuries. It is exceptionally rich in protein, B vitamins, iron, and phycocyanin — the pigment responsible for its deep blue-green color. Spirulina is widely studied for its effects on blood lipids, antioxidant capacity, and allergic responses.
Expert Evidence
3 references from 2 experts
“Personally, I do use spirulina to color my sleep supplement. Maybe there are potential additional benefits by using it as a colorant, but I don't plan on taking separate spirulina supplements at present.”
Spirulina “Significantly Improves Weight" in New Study
6:112 references in 1 episode from 2025
Stanfield uses spirulina only as a colorant in his sleep supplement and does not take it as a standalone supplement. He cites research suggesting 2-3 grams daily of powdered spirulina for at least 7-8 weeks may improve metabolic metrics in overweight individuals. No cautions or concerns were discussed.
“Both cases saw significant decreases in nasal obstruction, improved ability to smell, improved sleep, daily working inflammatory cytokines were reduced as well, reduction in nasal itching, all after taking two grams of spirulina.”
Unknown Title
1:45:271 reference in 1 episode from 2021
Huberman cites clinical evidence that 2 grams of spirulina reduced nasal obstruction, itching, and inflammatory cytokines while improving smell and sleep. He does not mention personal use, specific dosing guidance beyond the 2g figure from the study, or any cautions.
Side Effects
- Mild digestive discomfort
- Nausea at higher doses
- Potential allergic reaction in sensitive individuals
- Possible contamination with microcystins if sourced from unregulated producers
$0.04/ct
$25.95 total
$0.11/ct
$13.46 total
$0.16/ct
$27.99 total