Spirulina Powder (Arthrospira platensis)

Dried powdered Arthrospira platensis, Spirulina, a freshwater cyanobacterium (blue-green algae) that has been used as food since at least Aztec times in Mesoamerica. Spirulina is among the highest-protein-by-weight foods on Earth (typically 60-70% protein) and contains substantial B vitamins, iron, and other minerals.

Key Facts

Scientific name

Arthrospira platensis (formerly classified as Spirulina)

Type

Cyanobacterium (blue-green algae)

Native habitat

Alkaline freshwater lakes (East African Rift Valley lakes, ancient Lake Texcoco in Mexico)

Protein content

60-70% protein by weight (among the highest of any food)

Other notable content

B vitamins (B1, B2, B3), iron, beta-carotene, gamma-linolenic acid (GLA)

Historical use

Aztec food source from Lake Texcoco; Kanembu people of Chad from Lake Chad

What is Spirulina?

Spirulina is a microscopic spiral-shaped photosynthetic bacterium that grows in alkaline freshwater lakes. The cyanobacteria form thick mats that can be harvested, dried, and consumed as food. Two ancient cultures independently developed Spirulina as a major food source: the Aztecs harvested it from Lake Texcoco (where Mexico City now stands), and the Kanembu people of Chad continue to harvest it from Lake Chad. Modern commercial Spirulina is cultivated in shallow pools globally.

How to Use Spirulina Powder

Mix 1-2 teaspoons into smoothies, juices, or water. Spirulina has a distinctly strong "ocean" or "lake" flavor that many users find off-putting on its own; blending with fruity smoothies (banana, mango, pineapple) and acidic juices (lime, orange) masks the flavor effectively. Spirulina is also encapsulated for users who prefer to skip the flavor entirely.

Frequently Asked Questions

Is Spirulina a plant?
No; Spirulina is a cyanobacterium (blue-green algae), technically a bacterium that photosynthesizes.

What's the protein content?
60-70% protein by weight, among the highest of any food.

Did the Aztecs really eat Spirulina?
Yes; Spanish accounts of pre-Columbian Mesoamerica document Spirulina (called "tecuitlatl") as a food sold in Aztec markets.

What does Spirulina taste like?
Strong, slightly fishy or pond-like. Most users blend it with fruity smoothies to mask the flavor.

Is Spirulina vegan?
Yes; Spirulina is a complete protein source suitable for vegan and vegetarian diets.

Are there safety concerns?
Yes; Spirulina can be contaminated with toxins from other cyanobacteria if not sourced from controlled cultivation. Source from established cultivators rather than wild-harvested.

This product has not been approved by the Food and Drug Administration and is not intended to diagnose, treat, cure, or prevent any disease. We recommend that you consult with a qualified healthcare practitioner before using any herbal products, particularly if you are pregnant, nursing, or on any medications.