Rapid Nutrition PLC, a natural healthcare company, researches, develops, and produces a rage of science-based health and wellness products in the United Kingdom, Australia, Asia, the United States, and internationally. The company offers organic and natural scientific-based health food supplements under the SystemLS and Leisa's Secret brands. It also provides oral anti-viral therapy products to combat flu and common cold under the Azurene brand name. The company was founded in 2001 and is based in London, the United Kingdom.