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"
- The veg/non-veg mark and the manufacturer details 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
See Zespo Blue Spirulina (Phycocyanin) 250 mg - 60 Veg Capsules on zespo.in · Also on Amazon.in (search "Zespo").
About Zespo: brand facts and product index · All Zespo links
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.
Next step: See the full label and pack details on zespo.in · Zespo on Amazon.in
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