But hmmm...found this
Study reveals spirulina's power to suppress an overactive immune system
The study, reported in the December, 2008 issue of the journal Natural Medicine (Tokyo) was designed to test the ability of spirulina to modulate the immune system. The in vivo effect of spirulina on humoral immune response, cell-mediated immune response, and tumor necrosis factor alpha was investigated in mice. In vitro, its effect on induced T lymphocyte proliteration was analyzed.
The researchers found spirulina significantly inhibited the humoral immune response, cell mediated immune response reaction, and tumor necrosis factor alpha in the mice in a dose-dependent manner. In vitro, spirulina decreased the mitogen-induced T lymphocyte proliferation in a concentration-dependent manner when compared with controls. The scientists concluded that spirulina's ability to suppress the immune response was remarkable.
Learn more: http://www.naturalnews.com/025703_spirulina_diet_studies.html#ixzz25VaCwHyd