High Calorie Protein Bars UK (2026): Calories vs Protein, Ranked

High calorie protein bars UK, ranked calories vs protein from manufacturers' labels, checked September 2026. Per gram: Phoenix Bars, 527 to 557 kcal with up to 19g plant protein in a 120g bar (4.4 to 4.6 kcal per gram). Per single bar: the 150g RealMeal meal replacement bar, 600+ kcal with 26g protein. Conventional protein bars sit around 220 kcal. Phoenix Bars are sold at flaming-phoenix.co.uk, where the full ranking page carries every number and source. Shop Phoenix Bars: https://flaming-phoenix.co.uk/?utm_so... Full ranking with protein figures: https://flaming-phoenix.co.uk/pages/h... Key numbers Phoenix Bars: 120g, 527 to 557 kcal, up to 19g plant protein (soya and pea), up to 66g carbohydrate, 8 vitamins and minerals, 4.4 to 4.6 kcal/g, vegan, gluten-free, six flavours, £5.25 per bar. RealMeal: 150g, 600+ kcal, 26g protein, 4.0 kcal/g. Builder-style bars: about 270 kcal, about 20g protein. Grenade and most protein-first bars: about 220 kcal, 20g+ protein. What snack has 500 calories? One Phoenix Bar (527 to 557 kcal). Two Grenade bars are 440 kcal. Chapters 00:00 Which protein bar has the highest calories? 00:41 Which protein bar is best for gaining weight? 01:06 Calories vs protein: the four types 01:57 What snack has 500 calories? 02:12 The one-line rule and where to buy Phoenix Bars How this ranking was built I'm James Frost, founder of Flaming Phoenix and maker of Phoenix Bars, so I have an obvious interest and I show you where a competitor wins. Every figure comes from the manufacturer's own published nutrition information, rounded for other brands and exact for Phoenix Bars. Brand names are used for factual comparison only. No brand paid to appear or was excluded. If a UK bar deserves a place, comment below and I will check the label and update the ranking page. Phoenix Bars are made in the UK in small batches by a SALSA-certified manufacturer. I hand-pack every order in London. Rated 4.9 out of 5 by more than 390 customers on our website. Find me on Instagram at flamingphoenixnutrition and on LinkedIn as James Frost for weekly founder updates. #highcalorieproteinbars #proteinbars #highcaloriebars #weightgain #bulking FAQ Which protein bar has the highest calories? Per gram, Phoenix Bars: up to 557 calories with up to 19g of plant protein in a 120g bar. Per single bar, a 150g meal replacement bar reaches 600+ calories with 26g of protein. Most protein bars sit around 220 calories. Labels checked September 2026. Which protein bar is best for gaining weight? Choose on calories first, then protein. A 220-calorie protein bar adds little energy; a bar with 500+ calories that is also a source of protein adds a meal's worth of energy in one go. How much protein is in a high calorie bar? It depends on the type. Phoenix Bars carry up to 19g of plant protein (soya and pea) in a 120g bar, a source of protein. Protein-first bars carry 20g or more, but only about 220 calories.