![]() ![]() Spirulina bolsters your immune system by strengthening immune cells called natural killer (NK) cells, which attack perceived threats on a cellular level ( 10).Īnimal and human studies show that this effect may help slow tumor growth, improve resistance to illness, and decrease inflammation ( 10, 11, 12, 13).īut, by strengthening the NK cells in people with autoimmune conditions, this algae may exacerbate these conditions. May worsen autoimmune conditionsīecause spirulina boosts your immune system, it may worsen certain autoimmune diseases - such as lupus, multiple sclerosis, and rheumatoid arthritis - in which your immune system attacks your body ( 2). Spirulina grown in controlled environments is lower in microcystins, as scientists have developed methods to remove this compound, as well as limit its production ( 8, 9). Microcystin-contaminated algae supplements have been found in Italy, North America, and China, and these compounds are a growing public health concern due to their effects on your liver ( 6, 7, 8). When consumed in high amounts, they’re toxic to your liver ( 5). In fact, microcystins are produced by blue-green algae as a defense mechanism against predators. The algae may harbor toxins if it grows in a body of water that’s polluted with heavy metals, bacteria, or harmful particles called microcystins ( 2). ![]() Spirulina harvested in the wild poses a significant risk of contamination. Here are some of the potential side effects and downsides of spirulina: May be contaminated with toxins Although spirulina is generally considered safe, it may have some side effects and drawbacks - especially for people with certain health conditions ( 2, 4). ![]()
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