By Jacob Chambers, Founder & Lead Reviewer · Updated 26 June 2026
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Looking for the best vegan protein bars UK? We bought and tested 9 different plant-based protein bars to find the ones that win on taste, protein content and value for money, then narrowed them down to our top 3 recommendations. Frankly, the results surprised us.
We wanted to give every bar a fair, unbiased assessment, so we rated each one across the key areas that actually matter:
Crucially, we didn't over-weight any single factor like price or protein. A more expensive bar often scored highly elsewhere, while a lower-protein bar sometimes delivered outstanding value. After weighing everything up, here are the top 3 vegan protein bars money can buy.
The Misfits Vegan Protein Bar tops our list for a whole host of reasons. It's delicious and genuinely nutritious, with 15g of protein per bar, 8g of fibre and well-balanced macros so you won't feel guilty about reaching for one.
We opted for a Misfits Variety Box so we could try every flavour, and we weren't disappointed. Switching between flavours kept our quick snacks interesting. Our favourites were the Chocolate Caramel and the Chocolate Peanut; the Chocolate Caramel is about as close as you'll get to a vegan Mars bar.
On price, Misfits are very competitive at around £17-£20 for a box of 12, putting them firmly alongside other big brands without breaking the bank. They're also a 100% vegan company with plastic-free packaging and a strong focus on sustainability, another reason they earn the number one spot.
Our top pick
If you only buy one box, make it Misfits. They strike the best balance of protein, taste, price and sustainability of any bar we tested.
Next up is the PhD Smart Plant Bar, which takes the highest protein spot on this list. Each 64g bar carries 20g of plant protein, more than the Misfits bar and more than double the TREK flapjack, and it does that with less than 1g of sugar, which is the part most high-protein bars get wrong. It's finished with a smooth chocolate coating, and it's GMO free and palm oil free.
The honest catch is choice. On Amazon UK the plant version currently comes in Vanilla Fudge only, in a box of 12, so if you like rotating flavours to keep a daily snack interesting you have far fewer options here than with Misfits. Watch out for one thing while you're browsing, too: PhD's wider Smart Bar range runs to plenty of flavours, but those bars are whey based, so the Plant Bar is the one to pick if you need it to be vegan.
Overall, PhD have managed something many brands struggle with: a genuinely high-protein, low-sugar bar that's still good value for money.
Check price on Amazon
This one may surprise you, because a quick glance at the macros shows just 9g of protein per bar. But don't be fooled. What TREK's High Protein Flapjacks lack in raw protein they more than make up for in taste, value and quality of ingredients.
TREK offer 7 different varieties, and we love the Cocoa Oat and the Salted Caramel. These are flapjacks rather than typical protein bars, so they're a great pick if you fancy something a little different.
The price is the clincher: roughly £13-£17 for a box of 16 bars is exceptional value. Most high-protein bars sit around £20 for 12, so TREK are perfect if you want to keep costs down while still snacking healthily.
Check price on AmazonOur overall winner is the Misfits Vegan Protein Bar, with the perfect balance of protein content, quality ingredients, price and sustainability. View Misfits on Amazon UK.
If you're focused purely on high protein content, go for the PhD Smart Plant Bar. View the PhD Smart Plant Bar on Amazon UK.
And if you'd like to save a bit of money, the TREK High Protein Flapjack is the way to go. View TREK flapjacks on Amazon UK.
Our overall winner is the Misfits Vegan Protein Bar for its balance of taste, 15g of protein, low sugar, fair price and sustainability. The PhD Smart Plant Bar is best if you want the highest protein, and the TREK High Protein Flapjack is the best value option.
The PhD Smart Plant Bar has the most protein of our three picks, with 20g per 64g bar, and it manages that with less than 1g of sugar. Note that it is the plant version you want: PhD's wider Smart Bar range is whey based and not suitable for vegans.
Not necessarily. Several of the bars here are very low in sugar. The Misfits bar contains under 1g, and the PhD Smart Plant Bar also comes in at less than 1g per bar.
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