Copper is a naturally occurring free metal. The body uses this metal for a variety of actions and regulates proper amounts. Too much copper taxes the kidneys and liver and can be detrimental. The right amount is essential. A certain blue-green algae called spirulina has been found to reduce copper toxicity and improve blood and growth in fish. This modulating action, as seen in this fish study, effectively eliminates excess copper obtained through overloaded water, soil and air. This study could translate to helping people with toxic amounts of copper in their body.