What is it? A high-protein, low-carbohydrate, low-sugar snack bar, albeit one that sounds like the worst member of the Wu-Tang Clan.

How much does it cost? £2.95 per bar, or £29.88 for 12.

What does it promise? To quote the Carb Killa press release: “A generous helping of caramel laid over a soft, chewy base filled with deliciously crunchy milk chocolate crispies, all with less than 1.5g of sugar and impact carbohydrates”. A single bar contains 23g of protein, almost as much as a chicken breast. Essentially, it’s a chocolate bar for people who hate themselves after eating chocolate bars.

What’s it actually like? I’ve dabbled with post-workout protein bars intermittently during my adult life, and without fail two things happen. First, the bars taste a bit like earwax. And, second, I put them next to my desk and then eat them all in one go in the middle of a normal day because I can’t be bothered to go downstairs and get an apple. Happily, though, the Carb Killa tastes like a normal, non-proteiny chocolate bar. After a long and strenuous workout, this would be my snack of choice. It’s delicious. Perhaps too delicious, given that I kept them next to my desk, ate them all in one go and then had to grovel to the PR company for more because I’d forgotten to review them.

Best and worst bit The Carb Killa tastes like the thing it’s supposed to taste of, which is a rarity for protein bars. The downside is that this – combined with my stupendous laziness – meant I just ate another three in a row at my desk. By my calculations, that’s 642 calories unnecessarily consumed.

Is it worth it? If you’re more disciplined at chocolate than I am, absolutely.