Spirulina is a blue-green algae that naturally contains high levels of proteins, vitamins and minerals.

The spirulina in Solgar Spirulina 750 mg is sourced from India. There, it is cultivated under controlled conditions and then strictly tested for purity and the absence of contaminants. This ensures the product meets Solgar's high quality standards.

Each batch of spirulina is tested for purity and the absence of contaminants such as heavy metals or unwanted substances. This is important because spirulina from open water sources can sometimes become contaminated. Solgar chooses controlled cultivation and strict quality controls.