Spirulina is one of the most commonly used forms of blue-green algae, a type of aquatic plant used as an herbal supplement. Spirulina is made up of more than 60 percent amino acids and may serve as an excellent protein supplement, the University of Maryland Medical Center reports. This type of blue-green algae may also help boost your immune system and may protect your body against allergic reactions or infection. Despite these health benefits, spirulina supplements may cause side effects. Discuss the safety of spirulina treatment with your doctor before using this blue-green algae supplement.
Mild Side Effects
While taking spirulina supplements, you may experience mild side effects. Stomach irritation may occur, which may result in nausea, vomiting and loss of appetite. Spirulina may also cause restlessness or anxiety. Such side effects may lead to insomnia, a condition in which you experience repeated difficulty falling asleep or staying asleep through the night. These mild side effects of spirulina are typically temporary. However, consult your medical provider if any of these side effects do not subside or increase in severity.
Cyanotoxin Contamination
Infrequently, spirulina may be contaminated with a type of algae called Microcystis. Microcystis algae produce toxic chemicals called cyanotoxins such as microcystins, saxitoxin and anatoxin. If you accidentally consume spirulina contaminated with these toxins, you may be at risk of developing severe and potentially life-threatening medical complications. Cyanotoxin contamination may result in kidney failure, nerve damage, seizures, severe breathing difficulties, liver toxicity and heart muscle degradation. Seek emergency medical care if you believe you have been exposed to cyanotoxins to ensure you receive prompt and appropriate care.
Interactions with Other Drugs
Spirulina may interact with other drugs you are taking and may negatively affect the efficacy of your treatments. Always inform your doctor of any drug you are taking before beginning spirulina supplement treatment. Avoid taking spirulina if you are currently on immunosuppressive therapy with drugs such as infliximab, etanercept, adalimumab or azathioprine, the University of Maryland Medical Center warns. Spirulina may improve the function of your immune system. Consequently, using spirulina in conjunction with immunosuppressants may counteract the effects of such treatments.
Contraindications
Spirulina supplementation may not be safe for people with certain health conditions or concerns. If you have phenylketonuria (PKU), do not take spirulina, as this supplement is rich in all types of amino acids including phenylalanine. People who have autoimmune disorders, including lupus, rheumatoid arthritis and multiple sclerosis, should also avoid taking spirulina. Treatment with this supplement may exacerbate symptoms associated with your autoimmune disorder. Additionally, women who are pregnant or nursing should not use spirulina as the safety of this supplement during pregnancy is unknown.
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