Eroica benefits
Your protein bar just grew up.
Most protein bars are small, ultraprocessed and gone before your hunger has noticed. Eroica is everything they aren't.
Macros that matter
20g Protein • High Fibre • 409 Cals • Low Saturated Fat. Recovery for grown ups.
Energy & Antioxidant support
High in Vit E, Copper, Manganese, B2 & Magnesium*. Antioxidant protection your cells can use, plus real energy support.
"Top choice if you're on a muscle-building mission"
Men's Health magazine's verdict in their rundown of the best protein bars
Treat level taste
Not another chalky choc-coated brick. Fruit, Italian almonds, citrus and spice make Eroica soft, dense and satisfying.
100g of proper food in your kit bag.
Transparency
The bar aisle is full of protein sweets. Eroica is built like food.
No flavouring. No sweetener matrix. No UPF. Just a heroic bar made from real food.
What's really inside?
Handmade in Italy, Eroica is inspired by an ancient recipe that fueled Roman Legions,reimagined as a 100g protein bar with the size, calories and protein active bodies actually need.
Italian almonds
Italian candied peels
Coconut sugar
Egg white
Rice protein
Caramel
Cinnamon
Nutmeg
Macis
Natural wafer paper
Real people. Real bars.
For people who train, travel, recover and occasionally forget lunch exists.
Eroica is not a small protein block pretending to be food. It is a 100g XXL bar made for real appetites, real training and real life.
Real customer reviews
From people who read the label
Nicole Whittingham
Verified buyer
★★★★★
“Best protein bars around. Majority of the others… kill my stomach but these are brilliant - eat one every day.”
Blas Taracena
Verified buyer
★★★★★
“I eat them when I’m ski touring or cycling… I never had any stomach problem or feel myself weak.”
Keith Cook
Verified buyer
★★★★★
“After a few weeks using these as my go to recovery after training I am feeling the benefits.”
James Holloway
Verified buyer
★★★★★
“Really great taste, and great for recovery after tough sessions.”
John T
Verified buyer
★★★★★
“Most protein bars leave me feeling hungry, this is the opposite… it keeps hunger away for ages so I don’t end up making bad food choices on the go.”
Kathryn Peak
Verified buyer
★★★★★
“Eroica protein bars fill me up, and give me the protein I need for my exercise levels and as a perimenopausal woman.”
Norman Lynch
Verified buyer
★★★★★
“As the sugar is from fruit and doesn’t cause me to experience sugar spikes I will continue to purchase them.”
Matthew Penfold
Verified buyer
★★★★★
“You can tell they are full of goodness rather than rubbish - filling with no side effects.”
Kathryn
Trustpilot
★★★★★
“These make a great meal substitute on the go or after a workout. They’re nutritionally balanced, taste yummy, and made of real ingredients.”
Verified customer reviews from Judge.me, Trustpilot and Google.
Handmade in Tuscany
Born from history. Made for today.
Eroica is inspired by panforte, the dense, Italian fruit & nut delight first used by Roman Legions. We took that timeless power source and remade it as the ultimate natural protein bar.
Real food 10. UPF 0.
No synthetic trickery, just 10 natural ingredients in a mighty bar for people who want satisfaction and taste with their protein bar.
Trusted by the world's best. Made for you
33Fuel has fuelled elite performance since 2012
Tour de France winners
Proven at the top
Ironman World Champions
Endurance tested
Olympians
Elite standard
Premiership Football Clubs
Team performance
World-class trail runners
Built for the long haul
HYROX athletes
Strength-endurance elite
Free protein calculator
How much protein do you actually need?
Get your quick personalised protein target based on your body, training and goals. Built from over 50 peer-reviewed studies and over a decade's expertise fuelling elite performance teams.
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Studies behind it
100%
Personalised
No guesswork or gym-bro maths. Just a useful personalised protein target.
Try the calculator
Customers praised these natural protein bars for their delicious taste, often comparing them to Christmas cake or Italian panforte. Reviewers highlighted the bars' filling nature, wholesome ingredients without ultra-processed additives, and effectiveness for post-workout recovery. Some noted the dense texture requires a drink, but most appreciated the two-piece format.
I
5 XXL bars
I use either before as a meal replacements or after a heavy workout to support my health. Tastes great and does the job AAAAA++++
Awesome!! Thanks Ian for sharing :)
M
5 XXL bars
I think I've just discovered the most delicious way to consume 410 calories, to me they taste like Christmas cake but much harder work to eat, in a good way! I'll be back!
Thank you - we love that description! Glad you’re enjoying them, and we’ll look forward to welcoming you back soon.
I
15 XXL Bars
Perfecto mondo! Seriously good for someone who is very active. There is nothing better Thank you. Ian
Hey Ian, thanks so much for the lovely review! Those protein bars are dangerously moreish aren't they!! Glad you're loving them :)
S
15 XXL Bars
These bars are wholesome, filling and natural. I am not particularly keen on Christmas cake, but these have a similar texture and it's heavy enough that you know you have eaten something. I used (sometimes still am) to be a peanut M and M fan but after a bag, another one could easily be consumed. One Eroica bar is enough to satiate my need for something sweet, but made in such a way that it doesn't make me feel guilty for eating it.
Hi Simon, thanks so much for taking the time to share your feedback on Eroica.
We love that you picked up on feeling “properly filling” after eating a bar - that comes from real food ingredients doing their job, rather than ultra-processed fillers that leave you reaching for another bar (or bag of peanut M&Ms!) five minutes later.
We look forward to serving you again soon
I
5 XXL bars
Best snack bar I have tried. Fills me when I get hungry in the evening. A very tasty and organic way to snack. I have already given it for trying to my friends. Good job team
Thank you so much for this review, Isaac - we’re thrilled to hear Eroica has become your go-to evening snack, and a huge thanks for sharing it with your friends. Word-of-mouth from customers like you means the world to our small team.
Really appreciate you taking the time to leave this - you've made our day!
M
5 XXL bars
I had been trying various energy bars, most were bland and tasteless, or weird texture, then I came across Eroica, I think Internet search ('which bar is best'), this is the one I'll use (the rest went in the bin). Best flavour so far and nice balance of ingredients.
Hi Mike,
Thank you so much for this brilliant review!
We’re really glad Eroica finally gave you the flavour and texture you’ve been hunting for - that balance of real-food ingredients is exactly what we aim for. And we love that it beat out the rest (sorry to the bars that ended up in the bin 😅).
Thanks again for choosing 33Fuel!
A
5 XXL bars
After watching Joe Wicks Killer protein bar programme I was in the look out for bars that didn’t contain ultra processed ingredients. These jumped out at me and I ordered 5 as a trial. When they arrived I tried one after my next workout and can say that on first taste you can tell they are full
Of goodness rather than rubbish - have stuck with them and they are filling with no side effects and I would recommend if you want to get away from the rubbish protein bars you find in all supermarkets
Thanks so much for this lovely review. We love that Joe Wicks shone a light on the ultra-processed truth behind most protein bars - it’s exactly why we created Eroica in the first place. Real food, zero UPFs, and all the goodness your body deserves. We’re thrilled you found us and that the bars are fuelling you well after your workouts 💪
R
5 XXL bars
Very tasty snack bar & very filling. Really surprised how filling it was. I love the taste too. Nice product all round.
Hi Ravi, thank for your lovely feedback on our Eroica Protein Bar. We're thrilled to hear you're enjoying them so much, and look forward to serving you again soon.
A
5 XXL bars
Perfect for on the go protein!
Hi Abigail,
Thanks for the positive review of our protein bars - they are indeed ideal on-the-go fuel
Look forward to serving you again soon
M
Purchased & sampled the 33 fuel protein bars , a dense bar , reminiscent of a Christmas product with nuts peel and a little spice , a nice dry texture not greasy at all but best eaten with a drink , in 2 mini bars so can be consumed at 2 different times or shared . Would recommend.
N
I’ve been searching for a natural protein bar for ages but until I found 33Fuel protein bars I couldn’t find anything that didn’t contain a bunch of ingredients that were highly processed.
Your protein bars are both natural and moorish.
Initially I was deterred by the high sugar content, but as the sugar is from fruit and doesn’t cause me to experience sugar spikes i will continue to it purchases them.
The
Hi Norm,
Thanks for taking the time to leave your feedback - it's really appreciated.
I'm delighted to hear you enjoyed our Eroica Protein Bars. When we decided to create a protein bar, we knew we wanted it to be made with only 100% natural, powerful superfood ingredients. None of this ultra-processed nonsense, flavourings, additives or sweeteners. So I'm stoked to read you enjoy them for this reason (and the taste too!).
Yours in performance, health and a fitter future,
James
Team 33Fuel
N
These are absolutely delicious and great fuel for long runs. They remind me of Christmas cake. I could eat them every day.
Thanks for sharing your feedback Nick. I love them on my long runs too (but yes, they are outrageously moorish...I am never able to eat just one half and leave the other for later!)
Your in performance, health and a fitter future,
James
Team 33Fuel
K
Have tried a few brands of protein bars. Most brands use a lot of artificial ingredients which taste sickly sweet and keep me feeling hungry. Eroica protein bars taste like Italian fruit cake (yummy! 😋), fill me up, AND give me the protein I need for my exercise levels and as a perimenopausal woman. I would happily buy these again.
A
5 XXL bars
These bars strike a brilliant balance of calorific content and delicious flavour, without being sickly sweet or having a dry consistency. The variety of fruit and nuts in every mouthful is great, the bar doesn't crumble due to a moist consistency. Means as you cycle you can get a good bite and then stash it away. I need a pretty constant intake of food when I'm cycling and this double bar means I can carry less but get the calories I need to keep going. Very pleased I found such a great product!
M
5 XXL bars
It’s a proper big bar, super tasty, packed full of calories and protein. Goes well together with oat hot chocolate after a hard session.
M
5 XXL bars
Not your typical protein bar. Super tasty, in two 10 gram blocks and without nasty ingredients. I take a bar to work for either a mid morning snack or afternoon boost.
d
5 XXL bars
Eroica bars taste great and because they aren’t processed like other protein bars they feel like a much better choice!
D
5 XXL bars
Great tasting bar. You get two bars per pack and one is plenty for post-run refueling or just as a snack.
I
Bought a big pack of these bars, now need more because my partner keeps eating them!
n
5 XXL bars
Best Protein bars around. Majority of the others including Grenade kill my stomach but these are brilliant - eat one every day :)) Great to get my calories up as well quickly when I do multiple training sessions.
I
5 XXL bars
These monster bars (they’re packaged in two pieces but who can stop at one?) are really tasty. If you like panforte you’ll love these!
For a 40g protein boost, try along with a 33 Fuel chocolate protein shake...
J
5 XXL bars
I loved these bars, this was the first time I’d tried them. Really great taste, and great for recovery after tough sessions. Will definitely be buying again!
A
5 XXL bars
Easy to digest and taste great
L
5 XXL bars
We've taste-tested a vast array of protein bars on an epic quest for the ultimate snack, and honestly, these are the unrivalled champions! They're so delectable, we've instituted snack rationing to savour every last morsel. My better half and I partake in light-hearted skirmishes, battling for our share of these tasty treasures. Bravo, protein bar artisans!
G
5 XXL bars
Great tasting bars without that ‘ protein bar’ taste. All natural must be good for you too.
R
5 XXL bars
Buona super energetiche e sazianti.
Eroica Natural Protein Bar FAQs
✅ Your UPF-Free Protein Bar
✅ 20g protein and 409 calories per bar
✅ Supports lean muscle and optimal recovery
✅ Made from real food – zero ultra-processing
✅ Naturally high in fibre and satisfying
✅ Handmade in Italy using premium ingredients
✅ Twice the size of ordinary protein barsIt’s everything your body needs after training – and nothing it doesn’t.
• After workouts for maximum recovery
• As a high-protein snack to tide you over
• As part of a meal, or even dessert (pro tip: warm and top with custard - honestly, give it a go!)
Eroica is as at home in your gym bag as it is on your dinner plate.
Each bar contains:
✅ Italian almonds
✅ Candied citrus peels (orange, melon)
✅ Egg white protein
✅ Rice protein
✅ Coconut sugar
✅ Caramel, cinnamon, nutmeg, macis
✅ Natural edible wafer paper (potato starch)
Every ingredient has a purpose – and a flavour. No fillers, no junk, and no UPF. Just powerful, natural real food for your performance and health
Yes – it’s vegetarian-friendly and gluten-free. However, it’s not vegan due to the inclusion of egg white protein.
Not even close. Most bars are ultra-processed (UPF) franken-snacks packed with sweeteners and artificial fillers.
Eroica is completely UPF free and:
✅ Made with real food only
✅ Free from flavourings, emulsifiers or additives
✅ Handmade, not mass manufactured
It’s mighty food that fuels mightily – not a UPF 'food-like' product that fakes it and plays havoc with your digestion and health while doing so
✅ 20g protein to support muscle repair
✅ 409 calories for post-session energy replenishment
✅ Natural ingredients for better digestion and absorption
When you recover better, you train stronger. Simple.
Yes – every bar comes in fully recyclable packaging. No fancy foil. No unnecessary plastic.
Just smart, planet-friendly design that fits our Plant-Based & Planet-Based® Fuelosophy®.
✅ Real food only. Completely UPF-Free
✅ Twice the size of typical protein bars
✅ Handcrafted using a traditional Italian recipe
✅ Real flavour from real food
Most bars need artificial flavourings. Eroica just needs almonds and sunshine.
Yes – Eroica is high in protein and fibre, helping you feel fuller for longer and reducing the need for constant snacking. It’s a satisfying, guilt-free indulgence.
Tons. Just scroll to the bottom of the product page to see five-star reviews from customers who love Eroica’s taste, size and performance support.
That’s up to you and your training. One bar is a great recovery hit post-session. If using as a meal or snack, one bar can replace a small meal or curb hunger between meals. It also comes in 2 pieces for easier portion control
With 409 calories, healthy fats and complete protein, Eroica can absolutely double as a meal on the go.
It’s a real food option that keeps you going when life’s too busy to cook. Take a look at our Elite Meal Replacement Shakes for a complete replacement
Customers also bought
- High in Vitamin E and Riboflavin which contribute to the protection of cells from oxidative stress
- Source of Magnesium which contributes to the reduction of tiredness and fatigue
- Source of Phosphorus which contributes to normal energy-yielding metabolism
- High in Copper & Manganese which contribute to normal energy-yielding metabolism