Blue-green algae – of which Spirulina is a well-known example – are a group of 1,500 species of microscopic aquatic plants. Spirulina is particularly rich in protein and also contains carotenoids, vitamins, minerals, and essential fatty acids, though its vitamin B12 content does not appear to be readily usable by people. Blue-green algae provide balanced whole-food nutrition and are an excellent source of essential amino acids, minerals, vitamins, fatty acids, chlorophyll and large amounts of high quality protein.

Protection from cancer. Allergies. Liver diseases. Obesity. Decrease in energy. Loss of memory.

None

Individuals who do not consume several servings of vegetables per day could benefit from the carotenoids and other nutrients in blue-green algae. However, very large amounts are required to provide significant amount of proteins from the algae. Blue-green algae can be taken as a powder, flakes, capsules, or tablets. The recommended intake is 2,000–3,000 mg per day, divided throughout the day.

Blue-green algae grow in some lakes, particularly those rich in salts, in Central and South America and Africa. It is also grown in outdoor tanks specifically to be harvested for nutritional supplements.

Blue-green algae can produce nerve toxins and liver toxins. Sign of neurotoxin may appear within 15-20 minutes and include numbness of the lips, tingling in fingers and toes, and dizziness. It may however be hours or days before signs of liver poisoning appear. Liver toxins can cause abdominal pain, diarrhea and vomiting in humans Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or which is especially bothersome.

Acute Overdose: None Chronic Overdose: None

Blue-green algae, which is found in areas inundated with contaminated water, can cause accumulation of heavy metals which can increase the body’s load of lead, mercury, and cadmium