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Research shows Spirulina supplementation is associated with lower total cholesterol, LDL (“bad”) cholesterol, and triglycerides, and higher HDL (“good”) cholesterol in human studies. These effects have been seen consistently across multiple clinical trials.

Quality matters: look for products with independent third-party testing to screen for contaminants like heavy metals or microcystins. Brand transparency about cultivation conditions and lab certificates is an important trust signal.

Clinical reviews show that Spirulina’s antioxidants and other bioactives support immune function and help counter inflammation. This may be helpful in both everyday health and disease contexts, though more human clinical trials are needed to fully define effects.

In general, Spirulina is safe for most people but people with certain health conditions i.e., autoimmune diseases, phenylketonuria (PKU), pregnancy or bleeding disorders should consult a doctor before taking Spirulina.