Grenade UK Who Are We? Sports nutrition brand Grenade® aim to inspire people to get more out of life, whatever their fitness goals. Grenade® are all about choice and, with an award-winning, innovative product offering, including their best-selling Carb Killa® bars, there’s a supplement or snack to suit every need. Available in over 100 countries and across a number of retailers, gyms and health clubs, Grenade®’s following has grown rapidly since their launch in 2009 and they now cater to everyone from professional athletes and fitness enthusiasts to the everyday consumer.