Carb Killa® is available in a range of flavours made up from delicious triple layers, all coated in chocolate. With low sugar and low calories, this bar really is the perfect high-protein snack. Free from ingredients that were produced using modern biotechnology. In Grenade products using palm oil, we ensure that the ingredient is sustainably sourced. All palm oil used in Grenade products is certified as sustainable by the Roundtable of Sustainable Palm Oil (RSPO). Informed Sport Approved. Can be eaten any time of the day - from a delicious snack between meals, to a post-workout treat that is high in protein and low in sugar! Its chocolate coating and thick caramel layer mean its perfect to keep those chocolate cravings under control.