Blue algae, also known as spirulina, grows naturally in freshwater ponds. Blue algae are microscopic plants that share characteristics of both bacteria and algae. It is also grown commercially to produce dietary supplements. The supplement is available from health food stores in a powder, flake or tablet. Blue algae is marketed for its many health benefits such as antioxidant and anti-inflammatory properties.
Nutritional Information
One 500-mg serving of blue algae is not a significant source of carbohydrates, fat or protein. This serving has 10 calories, zero fat and 2 g of protein. Blue algae is marketed as being a rich source of protein. However, in comparison to the protein available in whole foods such as meat or fish, blue algae costs about 30 times as much per gram, reports Medline Plus.
Vitamins
Blue algae provides a source of vitamins A, C, E and B vitamins. Blue algae contains vitamin B12, which is the most difficult vitamin to obtain in a meatless diet. Manufacturers recommend a daily intake of 2,000 to 3,000 mg, but amounts shown to have helpful properties in animal studies would be equivalent to 34 g per day for a 150-pound human, according to the University of Michigan Health System.
Minerals
Blue algae provides a number of minerals in varying amounts. Of particular interest is the high content of iron, calcium, phosphorus and potassium. The very high iron content should be noted as iron deficiency is widespread, especially among women and children. Blue algae contain 550 to 1800 mg per kg. As a comparison, whole cereals, which are one of the best sources of iron, contain only 150 to 250 mg per kg. Calcium, phosphorus and magnesium occur in blue algae in quantities comparable to those found in milk.
Side Effects
You may experience side effects from taking blue algae. The most common side effects are headaches, difficulty concentrating, muscle pain, facial flushing and sweating, according to the Medline Plus. Anxiety, insomnia, nausea and vomiting are other possible side effects. As with any new treatment, speak to your doctor before adding blue algae to your diet.
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