What is spirulina?
Spirulina is a type of blue-green algae that can be consumed by humans. It is used as a dietary supplement since it is very high in protein and nutrients. It is rich in protein, vitamins, minerals, and carotenoids. It has antioxidants that can help protect cells from damage.
Spirulina appears safe, even at high doses. However it can be contaminated with toxic substances called microcystins. It can also absorb heavy metals from the water where it is grown.
Studies suggest that spirulina may boost the immune system, help protect against allergic reactions, and have antiviral and anticancer properties.
Spirulina is available in pill or powder form, or as flakes.
