Spirulina is the most commonly used type of blue-green algae, a sea plant rich in antioxidants, vitamins and minerals. Spirulina supplements may help boost your immune system function and may protect against allergic reactions. Additional research to validate these purported health benefits is necessary, however. Despite its varied medicinal uses, spirulina supplementation is not appropriate for everyone. If you have questions about whether you can take spirulina, consult your doctor for additional guidance.
Phenylketonuria
Do not take spirulina if you have a metabolic condition called phenylketonuria, or PKU. People with PKU have a genetic mutation that prevents their bodies from producing the enzyme needed to properly metabolize phenylalanine, an amino acid. Spirulina is a rich source of amino acids -- including phenylalanine -- making it difficult for people with PKU to digest this type of blue-green algae.
Autoimmune Disorder
If you have an autoimmune disorder, such as lupus, multiple sclerosis or rheumatoid arthritis, you should not take spirulina. In autoimmune disorders, your immune system overreacts and improperly attacks and destroys healthy cells and tissues. Spirulina may increase the activity of your immune system and may exacerbate the symptoms associated with your autoimmune disorder.
Pregnancy or Lactation
The U.S. Food and Drug Administration has not approved the safety and effectiveness of spirulina for anyone, including pregnant or lactating women. In addition, spirulina is susceptible to heavy metal contamination, which is toxic to pregnant women and their developing babies. For these reasons, do not take spirulina if you are pregnant or breast-feeding.
Use of Certain Medications
Spirulina may interact with certain medications. Avoid using spirulina in conjunction with immunosuppressant drugs, including methotrexate, prednisone, adalimumab and etanercept. The immune system-enhancing effects of spirulina may counteract the beneficial effects of these immunosuppresive therapies.
Under Age 18
Do not administer spirulina to children under the age of 18 without first consulting a medical professional. Children are more likely than adults to experience adverse side effects after taking blue-green algae supplements, including spirulina. Only a doctor can tell you how much spirulina is appropriate for your child.
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