Grenade Carb Killa Protein Chocolate Bar We've heard nothing but good things about this Grenade Carb Killa Protein Chocolate Bar (£19). It's beloved by customers on Amazon and POPSUGAR readers, and has only two grams of sugar per serving. Image Source: amazon.co.uk Grenade Carb Killa Protein Chocolate Bar £19 from amazon.co.uk Buy Now