You've undoubtedly heard about the benefits of spirulina. But with so many formats available — dried powder, capsules, liquid extracts — how do you choose? This article explores the real differences between whole dried spirulina and Spirulysat®, our concentrated extract, to help you make an informed decision.
Whole Dried Spirulina: The Nutritional Approach
Dried spirulina is the product in its most complete form. On paper, you benefit from all its components: proteins, amino acids, minerals (potassium, iron, magnesium), B vitamins, β-carotene, chlorophyll, and of course, phycocyanin.
It's this richness that leads people to call spirulina a "superfood."
Advantages:
- Natural product, no extraction
- Complete nutritional profile
- Convenient (capsules, powder)
- Generally more affordable
Phycocyanin content: Phycocyanin makes up approximately 10 to 20% of the dry weight of spirulina biomass. Practically speaking, a common dose of 3 g per day of dried spirulina theoretically provides 300 to 600 mg of phycocyanin — assuming good initial quality and good absorption.
However, reality is quite different from theory:
- Slow absorption: Phycocyanin must first dissociate from the cellular matrix after ingestion, which takes about 4 hours. In practice, due to the duration of digestion, the body will only have time to assimilate an infinitesimal part of the phycocyanin naturally present in the biomass.
- Loss of functional efficacy: Phycocyanin is a fragile molecule, very sensitive to heat. It therefore tolerates the biomass drying step, required to prepare powder or tablets, very poorly. This process alters the original molecular structure of phycocyanin, which is the basis of its functional activity. Phycocyanin is therefore always present in whole dried spirulina but has lost most of its functional qualities.
- Reduced bioavailability: Even when of good quality, the phycocyanin content remains diluted in a complex matrix, which limits its absorption.
- Often distant origin: A significant portion of whole dried spirulina comes from China or India. This does not mean it is of poor quality. However, the quality assessment criteria are often different from those applied to European products. The environmental impact of these distant supplies is also greater.
Spirulysat®: The Functional Approach
Spirulysat® is a liquid extract concentrated in phycocyanin, developed by Algosource and obtained through a patented bio-extraction process designed to preserve the native structure of this molecule to maintain its full efficacy. Unlike whole spirulina, this process pursues a different objective: to isolate and concentrate the most studied component of spirulina to maximize its biological availability.
The liquid form of Spirulysat® is the clinically established prerequisite for ensuring the full functional activity of phycocyanin.
Advantages:
- Superior bioavailability: In liquid form, isolated from the rest of spirulina's components, phycocyanin is immediately available for absorption.
- Rapid absorption: Unlike the 4 hours required for dried spirulina.
- Measured efficacy: In a comparative study, Spirulysat proved to be 50 times more effective than whole dried spirulina in terms of antioxidant action on SOD (a marker of the reaction to superoxide ions).
- Clinical validation: Spirulysat is the only liquid spirulina extract that has been the subject of a randomized, double-blind, placebo-controlled clinical trial in humans (Spirox study).
Limitations:
- Targeted approach to the functional aspect of spirulina — you get optimized phycocyanin, not the full nutritional spectrum of spirulina.
- Requires extraction, thus a more demanding process and a higher cost than whole spirulina.
Clinical Context: What We Really Know
It's important to be transparent here. The majority of studies on phycocyanin have been conducted in vitro (in the laboratory) or on animal models.
Spirulysat® stands out precisely because of the Spirox study, a randomized, double-blind, placebo-controlled trial conducted on humans, which validated the antioxidant effect of the extract. This is currently the only clinical validation performed on humans for a liquid spirulina extract of this type.
Algosource thus remains the only player to have scientifically demonstrated, through human clinical trials, a validated antioxidant effect on a liquid spirulina extract concentrated in phycocyanin.
Which to choose?
Whole dried spirulina is suitable if you:
- Are looking to meet a nutritional need.
- Want a more economical option.
- Accept greater variability in quality and an origin that is not necessarily clear.
Spirulysat® is suitable if you:
- Are looking for maximum and rapid antioxidant efficacy (energy, vitality, recovery, resistance to effort).
- Want a standardized, reliable, quickly assimilable dose.
- Value clinical validation on humans and French origin.
Conclusion
Whole dried spirulina and Spirulysat® are not strictly competing products — they address two different expectations. Whole dried spirulina is a nutritional supplement. Spirulysat® is an optimized extract for the concentration and bioavailability of a scientifically validated component.
The choice depends on your priority: nutritional intake or maximum antioxidant efficacy with clinical validation. Taking both can be a relevant choice to reap all the benefits of this particularly rich microalga.