Spirulina

Spirulina is a cyanobacterium, commonly referred to as blue-green algae, that grows naturally in alkaline lakes and is cultivated commercially for dietary supplements. It is one of the most nutrient-dense wholefood ingredients available, containing protein, B vitamins, iron, and phycocyanin — the pigment that gives it its distinctive blue-green colour. Spirulina is typically sold as a powder or tablet and is increasingly used in gummy and sachet formats for brands targeting the daily greens and plant-based nutrition segments.

Brands use Spirulina to differentiate their gummy ranges with a wholefood, natural ingredient that signals "green" nutrition. It is particularly popular in detox, energy, and general wellness positionings. Because Spirulina has no EFSA-authorised health claims, brands typically pair it with co-formulated nutrients such as Vitamin C or iron to deliver claimable benefits, or position it around its natural colour and wholefood credentials.

Origin and history

Spirulina has been consumed by humans for centuries, with historical records showing its use by the Aztecs in Mexico and by populations around Lake Chad in Africa. It was harvested from natural alkaline lakes and dried into cakes for consumption. Modern commercial cultivation began in the 1970s, with large-scale production facilities established in the United States, China, India, and other countries.

Today, Spirulina is produced in controlled open-pond or closed-photobioreactor systems. The algae is harvested, washed, and dried — typically by spray-drying or freeze-drying — to preserve its nutrient content. The resulting powder is used directly in supplements or as a natural colourant in foods and beverages. Industrial production allows for consistent quality and nutrient profiles, though taste and odour remain formulation challenges.

Scientific overview

Spirulina contains approximately 60-70% protein by dry weight, along with B vitamins (particularly B12), iron, and the antioxidant pigment phycocyanin. Phycocyanin is responsible for Spirulina's blue colour and has been studied for its antioxidant properties. The protein content includes all essential amino acids, making Spirulina a complete plant-based protein source. Iron in Spirulina is present in a form that is more bioavailable than many other plant sources.

Bioavailability of Spirulina's nutrients is generally good when consumed as a wholefood, though the cell wall of the algae must be broken down during processing to release nutrients. Spray-dried and freeze-dried powders have higher bioavailability than sun-dried forms. The phycocyanin content is sensitive to heat and light, so processing conditions must be controlled to preserve colour and antioxidant activity.

From a manufacturing perspective, Spirulina presents significant challenges in gummy formats. The minimum effective dose for general wellness positioning is 1500 mg, which requires 4-6 gummies at typical gummy weights. The strong algae taste is very difficult to mask, requiring significant flavouring and sweetener systems. Sachet formats are often preferred for higher doses, as the powder can be mixed into water or smoothies without the taste challenges of gummies. Spirulina is heat-stable and soluble in gummy matrices, but the payload and taste issues make it impractical for single-gummy delivery at therapeutic levels.

Spirulina is one of the most familiar and commercially understood wholefood ingredients across EU and US markets. Brands use it to create a "green" positioning that signals natural, plant-based nutrition. It is particularly popular in daily greens blends, detox programmes, and plant-based protein ranges. The natural blue-green colour also allows brands to create visually distinctive gummies without artificial colours, appealing to the clean-label consumer.

From a formulation and manufacturing perspective, Spirulina is heat-stable and soluble in gummy matrices, which are positive attributes. However, the high dosage required for meaningful nutrient delivery (1500 mg minimum) means that a single gummy cannot deliver a therapeutic dose. Brands typically use Spirulina as part of a multi-gummy serving or in combination with other greens ingredients. The strong algae taste requires significant investment in flavouring systems — tropical fruit flavours, mint, or citrus are commonly used to mask the taste. Sachet formats are often more practical for higher Spirulina doses.

For pack copy, brands should position Spirulina around wholefood nutrition, natural colour, and plant-based protein. No disease claims are permitted. Spirulina has no EFSA-authorised health claims, so any health-related copy must come from co-formulated nutrients. DAT reviews claim wording per project to ensure compliance with EU and UK regulations. Certification status (vegan, kosher, halal, organic) depends on the selected raw material and supplier documentation. DAT confirms certification status per project and batch before final label claims. DAT confirms final shelf-life claims per project with stability data.