Blue Green Algae Information

Spirulina species include a few of the hundreds of species collectively known as blue-green algae. Because there are a variety of different types of algae, they are classified according to their color: green, blue-green, yellow-green, red, and brown. Similar to plants, algae remove carbon dioxide from the air and release oxygen. However, algae are able to synthesize and create proteins and sugars as do animals. Algae multiply very rapidly. The two most common species of algae used for human consumption are spirulina maxima and spirulina platensis.

Most of the health benefits claimed for blue-green algae supplementation are supported by anecdotes rather than scientific evidence. Studies have indicated several properties of large amounts of spirulina or spirulina extracts including antioxidant, antiviral, anticancer, anti-allergy, immune-enhancing, liver-protecting, blood vessel-relaxing, and blood lipid-lowering, but there is no concrete scientific evidence that can substantiate these indications.

Some studies indicate that taking blue-green algae may have a positive effect on both weight loss and high blood pressure.


Blue-green algae can be taken as a powder, flakes, capsules, or tablets. A manufacturer's recommended intake is 2,000 - 3,000 mg per day divided throughout the day. However, typical amounts shown to have helpful properties in animal studies would be equivalent to 34 grams per day or more for a 150-pound human.