Spirulina

What Is Spirulina?

Spirulina is not a plant. It is Arthrospira platensis, a spiral-shaped cyanobacterium — a blue-green microalga — farmed in warm, alkaline water, then harvested and dried. This one is certified organic and pressed into tablets, with 3,000 mg of organic spirulina per serving.

How It Works in the Body

Spirulina works as a food, not as a single active compound. About two-thirds of its dry weight is protein, and it arrives with all nine essential amino acids.

The blue color is phycocyanin, a light-harvesting protein built around a tetrapyrrole pigment — the same chemical family as the heme in blood. Chlorophyll, beta-carotene and zeaxanthin sit alongside it, with iron and gamma-linolenic acid, a fatty acid uncommon in food. Those pigments act as antioxidants, soaking up reactive molecules before they reach a cell membrane.

What It Supports

• Whole-food protein: Most of spirulina's dry weight is protein carrying all nine essential amino acids.
• Antioxidant defense: Phycocyanin and the carotenoids act as antioxidants and support the body's own antioxidant defenses.
• Iron intake: Spirulina contains iron, the mineral hemoglobin uses to carry oxygen through the blood.
• Beta-carotene: The carotenoid pigments include beta-carotene, which the body converts into vitamin A as it needs it.

Who It May Suit

People eating vegan or vegetarian who want a whole-food source of protein, iron and carotenoids rather than isolated nutrients. Nothing here is animal-derived. A serving is six tablets, so it suits people who do not mind swallowing several at once.

Good To Know

Spirulina is often listed as a source of vitamin B12, but most of what it holds is an analogue the human body cannot use, so it is not a B12 source. It is also high in phenylalanine. Talk with your healthcare provider before use if you have phenylketonuria or an autoimmune condition.