USN SA - Ultimate Sports Nutrition | 12,190 followers on LinkedIn. Challenge Yourself with USN, the No.1 sports supplement and nutrition brand in South Africa. | HISTORY USN was founded in 2000 in South Africa by Albe Geldenhuys and has been at the forefront of sports nutrition research. USN is a global leader in sports nutrition, delivering premium-quality supplements to support optimised health and performance. Trusted in over 90 countries, we are committed to helping individuals achieve their fitness goals through scientifically backed formulations.