By the Zespo team · Updated 26 October 2026
Spirulina (Arthrospira platensis) is a microscopic, spiral-shaped cyanobacterium that grows in warm, alkaline lakes. It is usually sold as a dark green powder.
Where does the blue come from?
Green spirulina contains both green chlorophyll and a vivid blue pigment-protein called phycocyanin. "Blue spirulina" is phycocyanin separated from the rest of the spirulina, which leaves a bright blue powder with almost no grassy taste.
Used as a natural colour
Phycocyanin is widely used as a natural blue food colour in sweets, drinks and ice cream, because few natural blues exist.
Green vs blue on a label
A green spirulina label lists whole spirulina powder. A blue spirulina label should state the phycocyanin content per serving.
What to check before you buy
- The amount of each ingredient per serving, not just per capsule
- How many capsules make one serving and how many servings are in the pack
- Whether any ingredient sits inside an undisclosed "proprietary blend"
- An FSSAI licence number and the veg/non-veg mark on the pack
Label facts: Zespo Blue Spirulina (Phycocyanin) 250 mg - 60 Veg Capsules
- Phycocyanin, the blue pigment protein concentrated from Spirulina platensis
- One capsule per serving, 60 servings per bottle
- Plant-source algal nutrient, suitable for vegetarians
- Made in India in a GMP-certified facility, FSSAI-licensed
See Zespo Blue Spirulina (Phycocyanin) 250 mg - 60 Veg Capsules on zespo.in · Also on Amazon.in (search "Zespo").
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Zespo products are food supplements, not medicines. This article is for general information and is not medical advice. Take supplements as directed on the label and speak to a qualified healthcare professional if you are pregnant, nursing, taking medication or have a medical condition.
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