Spirulina processing is relatively simple, and no harsh chemicals or solvents are involved. However, avoid spirulina that is grown using un-tested seawater or surface water, which can expose one to heavy metal toxins, chemical fertilizers, and pesticides. It is best to choose a spirulina grown organically because of this. Spirulina is considered a superfood because it contains various nutrients and even protein levels comparable to eggs. Spirulina is also rich in antioxidants, which can help protect cells from damage. Some studies have suggested other benefits such as improving clinical and metabolic parameters of Alzheimer’s disease and reducing physical and mental fatigue.