In the pharmaceutical and nutraceutical sectors spirulina is considered to be a fantastic source of antioxidants, which can protect against oxidative damage, a problem that can cause many chronic diseases such as cancer, diabetes, arthritis and heart disease.
The main active component is phycocyanin. This antioxidant substance gives spirulina its unique blue-green colour. Phycocyanin can fight free radicals and inhibit production of inflammatory signalling molecules, providing impressive antioxidant and anti-inflammatory effects. Spirulina appears to have anti-cancer properties, especially against oral cancer, and some studies show that it may reduce blood pressure, improve symptoms of allergic rhinitis and may be effective against anaemia.