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SiS (Science in Sport®) PLC is a leading sports nutrition business that develops, manufactures and markets science-led nutrition products for professional athletes, sports and fitness enthusiasts and the active lifestyle community. SiS (Science in Sport®) PLC (company number 08535116) was founded in 1992 and is headquartered in London, EC1N. Our manufacturing facility is in Blackburn, and all our products are thoroughly tested and certified through the Informed-Sport programme.