2:1 Bar

85 reviews
30 g CHO per bar | 10 bars
Quantity: 10 x 42 g

Energy bar with 30 g of glucose and fructose in a 2:1 ratio.

Best for:

  • Low- and mid-intensity exercise
  • Fast and sustained energy
  • When you want a bar with a dense texture 


Try a few different flavours
Regular price£19.99 Sale price£9.99Save £10.00
Flavor:
Quantity: 10 x 42 g
Banana–Chocolate (02/28)

Brownie (11/27)

Dispatch within 48 hours. Delivery time 1 - 4 days.

2:1 Bar

£19.99 £9.99

The 2:1 Bar contains a precise blend of fast and slow carbohydrates, helping you stay energized during long, steady workouts while also being satisfying to eat.

Fast and Sustained Energy

The 2:1 Bar contains the carbohydrates glucose and fructose, which are rapidly absorbed to provide fast energy. It also contains small amounts of fiber, protein, and fat, which slow down digestion slightly and extend carbohydrate availability. The result is an energy bar that provides quick energy followed by steady release to reliably sustain performance during long, low- and mid-intensity workouts.

Optimal Absorption

Glucose and fructose are absorbed by different transporters in the gut. By combining these two carbohydrates in a 2:1 ratio, the 2:1 Bar allows your body to absorb more carbohydrates per hour while reducing the risk of gut discomfort.

Baseline Hydration

Each bar contains 100 mg of sodium to help replace sweat losses and support fluid absorption. The amount is intentionally moderate, making the bar suitable for situations where you aren’t sweating heavily or when you’re getting electrolytes from other sources.

  • Fast- and slow-release carbohydrates
  • Preserves glycogen stores
  • 30 g of carbohydrates per bar
  • Supports hydration
  • Prevents muscle cramps
  • Soft texture for easy chewing
  • Does not melt or crumble
  • Vegan and contains no artificial sweeteners 

We recommend consuming 1-2 bars per hour during low- to moderate-intensity exercise. However, if you have higher energy needs and tolerate solid foods well during exercise, you may consume up to 3 bars per hour or combine them with gels and drinks to meet your hourly carbohydrate targets. You can also consume 1 bar before your workout. 

Each bar provides 100 mg of sodium. If you’re sweating heavily, consider consuming additional sodium alongside this bar.

Note: The 2:1 Bar contains some fat, fiber, and protein. These can slow down digestion and cause GI discomfort during high-intensity workouts. Because of this, we do not recommend taking 2:1 Bar immediately before or during high-intensity workouts. Fueling bars containing only rapidly-digesting carbohydrates, such as Jelly Bar, are better choices for these workouts.

  Per Bar (42g) Per 100g
Energy 666 kJ / 159 kcal (8%)* 1585 kJ / 378 kcal (19%)*
Total Fat 2.6 g (4%)* 6,3 g (9%)*
of which saturated fat 2.1 g (11%)* 5 g (25%)*
Total Carbohydrates 30 g (12%)* 71 g (27%)*
of which sugars 18 g (20%)* 43 g (48%)*
Dietary Fibre 0.6 g (**) 1.3 g (**)
Protein 1.1 g (2%)* 2.5 g (5%)*
Salt 0.25 g (4%)* 0.6 g (10%)*
of which sodium 100 mg (**) 240 mg (**)

*Reference intake of an average adult (2000 kcal / 8400 kJ). Your daily values may be higher or lower depending on your calorie needs. **Reference intake is not defined.

Carbohydrate-based energy bar. Ingredients: dates, maltodextrin, isomaltulose*, oat flour (GLUTEN), glucose syrup, coconut oil, humectant: glycerol; cocoa powder, natural flavoring, sea salt, sodium citrate, emulsifier: lecithin. Provides 41 g glucose and 21 g fructose per 100 g. May contain peanuts and nuts. *Isomaltulose is a source of glucose and fructose. Storage: store in a cool and dry place. Net Quantity: 10 x 42 g.

Who should use the 2:1 Bar?
The 2:1 Bar is designed for endurance athletes, including cyclists, runners, triathletes, and long-distance athletes. It is particularly suited for long, steady workouts at low to moderate intensities when solid foods are well tolerated. The combination of fast- and slower-digesting carbohydrates helps provide both quick energy and sustained fuel.

How many 2:1 Bars should I take per hour?
Your carbohydrate intake should match the duration and intensity of your workout. Each 2:1 Bar provides 30 g of carbohydrates. For low- to moderate-intensity workouts lasting longer than 90 minutes, most athletes aim for 30–60 g of carbohydrates per hour (1–2 bars). 

What’s the maximum number of bars I can take per hour?
Most athletes can comfortably digest 1–2 bars per hour during low- to mid-intensity exercise. Those who are used to higher carbohydrate intake and tolerate solid foods well may consume up to 3 bars per hour. Individual tolerance varies, so it’s best to start with 1 bar per hour and adjust during training to find what works best for you.

Can I use the 2:1 Bar during races or high-intensity workouts?
The 2:1 Bar is not recommended for races or high-intensity workouts. It contains small amounts of fat, protein, and fiber, which slow down digestion and may cause gut discomfort at high intensities. For races or hard efforts, we recommend products that contain only rapidly absorbed carbohydrates, such as the 2:1 Drink, 2:1 Gel, or 2:1 Jelly.

Why does the 2:1 ratio matter? 
The 2:1 glucose-to-fructose ratio is important because glucose and fructose are absorbed in the gut via different transporters. There is a limit to how much each transporter can process. On average, most people can absorb a maximum of 60 g of glucose and an additional 30 g of fructose per hour. By combining these carbohydrates in the right ratio, the 2:1 Bar allows you to absorb more total carbohydrates, helping provide steady energy and reducing the risk of stomach discomfort during long or intense sessions. However, these numbers aren’t fixed. Everyone’s digestive system absorbs carbohydrates a little differently, so individual tolerance may vary.

Which is better, a 2:1 or a 1:0.8 glucose-to-fructose ratio?
Both ratios are designed to take advantage of how the body absorbs glucose and fructose through different gut transporters, allowing you to take in more carbohydrates per hour with less risk of stomach discomfort. However, everyone’s digestive system digests carbohydrates slightly differently, so some athletes tolerate the 2:1 ratio better, while others prefer the 1:0.8 ratio. The 2:1 ratio contains slightly less fructose, making it less sweet, whereas the 1:0.8 ratio is a bit sweeter. Ultimately, the best choice comes down to your personal preference and what your body tolerates better.

Can I use the 2:1 Bar for gut training?
Yes. Each bar contains a moderate amount of carbohydrates. This makes it easy to gradually increase intake over time. This helps your digestive system adapt so you can tolerate higher carbohydrate intake during long workouts or races.

Why does the 2:1 Bar contain 100 mg of sodium per bar?
Sodium is an important electrolyte that helps maintain fluid balance and support muscle function during exercise. Each 2:1 Bar provides 100 mg of sodium to contribute to your hourly electrolyte needs. 

Should I add extra sodium when using the 2:1 Bar?
If you sweat heavily, train in hot conditions, or are prone to cramping, additional sodium may be helpful. You can pair the 2:1 Bar with electrolyte products to meet your individual needs.

Can I combine the 2:1 Bar with gels or drinks?
Yes. Many athletes combine bars with gels or drinks to reach their hourly carbohydrate, sodium, and fluid targets. For optimal gut comfort and absorption, we recommend pairing it with products that also use a 2:1 glucose-to-fructose ratio.

How fast does the 2:1 Bar provide energy?
The 2:1 Bar provides both fast and sustained energy. The glucose and fructose are rapidly absorbed, giving you quick energy, while fiber, protein, and fat extend energy availability to help sustain performance over long, steady efforts.

Is the 2:1 Bar gluten-free?
The 2:1 Bar contains oats, which are naturally gluten-free. However, oats are often processed or stored in facilities that also handle wheat, barley, or rye, which can lead to trace gluten contamination. Because of this, we cannot guarantee that the 2:1 Bar is completely gluten-free.

Trusted by Professional Athletes

  • 5 stars: 60 (71%)
  • 4 stars: 15 (18%)
  • 3 stars: 7 (8%)
  • 2 stars: 3 (4%)
  • 1 star: 0 (0%)
M
Mario B. (Italy)
2:1 BAR

Gustosa,energetica,morbida.

Ciao!

Grazie mille per la tua recensione! 😊 Siamo felici che la 2:1 Bar sia stata di tuo gradimento. Grazie per la fiducia!

Cordiali saluti,
The 4Endurance Team

D
Dante D.F. (Italy)
energia pulita

una massa di carboidrati utile nelle pause più lunghe, impasta leggermente la bocca ma sempre fruibile

Grazie mille per il tuo feedback! Ci fa molto piacere sapere che la barretta rappresenti un'utile fonte di carboidrati durante i tuoi allenamenti. Grazie anche per il suggerimento sulla consistenza. Buone pedalate o corse e a presto!

Cordiali saluti, 4Endurance

A
Anonymous (Czechia)
Great taste opening is easy

Great taste and is really easy to open

Hi there! We're so glad to hear you loved the taste and found it super easy to open! Thanks a ton for sharing your experience with us!

Best regards, 4Endurance Team

A
Anonymous (Germany)
Wirklich vernünftiges Preis-Leistungsverhältnis

Habe viele Marken probiert. Hier passt die Wirksamkeit, die Verträglichkeit, und der Preis. Da hört man auf, selbst zu mischen. Prima …

Vielen Dank für deine positive Rückmeldung! Es freut uns sehr, dass du mit unserem Produkt zufrieden bist und es dir weiterhilft. Bei Fragen stehen wir dir gern zur Verfügung. Beste Grüße, dein 4Endurance Team

R
Ricardo A. (Portugal)

Textura espetacular e bastante saborosa.

Olá Ricardo, agradecemos muito a tua avaliação positiva! Ficamos felizes por teres gostado da textura e do sabor do nosso produto. Esperamos ver-te novamente em breve!

Atenciosamente,
Equipe 4Endurance

J
Josef S. (Austria)
2:1 BAR

Produkte sind immer okay Preisleistung und Zusammensetzung nichts zum aussetzen kannst nur empfehlen

A
Amílcar D. (Portugal)

Ótimo paladar e muito macias fácil de digerir

Olá Amílcar,
Muito obrigado pela sua avaliação! Ficamos muito felizes por saber que gostou do sabor das nossas 2:1 Bar e que as considerou macias e fáceis de digerir. Agradecemos a sua confiança e desejamos-lhe muitos treinos e desafios de sucesso!
Cumprimentos,
Equipa 4Endurance

P
Peter M. (Hungary)

2:1 Bar Box

J
Jordan W. (United Kingdom)
Superb stuff, highly effective and tastes great

Superb stuff, highly effective and tastes great. Combined with the gels and carb mix I can easily take on 100g of carbs per hour. Perfect.

Great to hear this is working so well for you, Jordan Really good to see you comfortably reaching 100g of carbs per hour with it and getting both performance and taste on point 💪

V
Valentina (Spain)
Te sacan de apuros

Al tener 30gr de CHO por porción es fácil suministrar el consumo por horas de tu preferencia. Respecto al sabor está bastante bien, sin embargo, son muy, muy dulces, dato importante a tomar en cuenta si te empalagas rápido.
A pesar de las altas temperaturas mantienen su forma.

G
Giuseppe S.
Ottima fonte di energia per le uscite anche

Ottima fonte di energia per le uscite anche quelle impegnative…

Top, Grazie :)

l
luciano d.n.

Ottimo

Ciao!

Grazie mille per la tua recensione! 😊 Siamo felici che il prodotto sia stato di tuo gradimento. Grazie per la fiducia!

Cordiali saluti,
The 4Endurance Team

V
Vitor

Excelente, tanto as barras como os géis.
Irei encomendar mais com certeza
Obrigado

Olá, Vitor! Muito obrigado pelo teu feedback espetacular! Ficamos super felizes por saberes que gostaste dos nossos produtos. Ficamos à tua espera para o teu próximo treino e a tua próxima encomenda!

Um abraço,
A equipa da 4Endurance Portugal

J
John

Excellent products and service and great prices

Thanks so much for the awesome review! We're super happy to hear that you're loving the 2:1 Bar, as well as our prices and service. Your support means a lot to us—good luck with your upcoming training!

Best regards,

The 4Endurance Team

C
Cazzulani
Barrette 2:1

Buona barretta, potrebbe essere ottima se non fosse così gommosa da masticare.

Ciao!

Grazie per aver condiviso il tuo feedback! Ci fa piacere sapere che hai apprezzato la barretta. Terremo sicuramente in considerazione il tuo commento sulla consistenza, che può fare la differenza nell’esperienza del prodotto.

Cordiali saluti,
The 4Endurance Team

R
ROBERTO M. (Italy)
ROBERTO 62

PRODOTTO OTTIMO,PIACEVOLE ANCHE COME GUSTO

Ciao!

Grazie mille per la tua recensione! 😊 Siamo davvero felici che tu sia soddisfatto del prodotto e che ti piaccia anche il gusto. Grazie per la fiducia!

Cordiali saluti,
The 4Endurance Team

G
Giuseppe C. (Italy)

2:1 Bar

Hi!

Thank you for your review and for the rating! 😊 We're happy to hear that you enjoyed the 2:1 Bar and we appreciate your feedback.

Best regards,
4Endurance Team

P
Pierantonio D.

2:1 Bar

Ciao!

Grazie mille per la tua recensione! 😊 Siamo felici che la 2:1 Bar sia stata di tuo gradimento. Grazie per la fiducia!

Cordiali saluti,
The 4Endurance Team

A
Anonymous (The Netherlands)
Kleverig maar lekker

Ik vind vooral de brownie reep echt top! Voor een race is hij misschien wat klevering, maar voor lange duurtrainingen echt een lekkere en goede energie reep!

Bedankt voor de geweldige review! Tof dat de 2:1-reep je zo goed helpt tijdens het sporten. Veel succes met al je lange duurtrainingen!

Groetjes,
Team 4Endurance

I
Idrisse

Je mets juste quatre étoile car je n est pas pu suivre le déroulement du produits

Merci beaucoup pour ton avis ! Navrés pour le manque de visibilité sur l'acheminement de ton colis. Si tu as besoin d'aide pour tes futurs suivis, notre équipe est toujours disponible pour t'aider. À fond sur tes prochains entraînements !

Cordialement,
4Endurance

P
Paolo C. (Italy)
2:1 Bar gusto Brownie

Barretta facile da aprire, il gusto è gradevole e non troppo dolce, si mastica bene e non si attacca in bocca, anzi quasi si scioglie.
La trovo molto valida.

Ciao!

Grazie mille per la tua recensione! 😊 Siamo felici che la 2:1 Bar ti abbia soddisfatto e che tu abbia apprezzato la tua esperienza con il prodotto. Grazie per la fiducia!

Cordiali saluti,
The 4Endurance Team

L
Lionel P. (France)
Bien

J'étais déçu par la texture lors de la 1ère utilisation, mais c'était à cause de la forte chaleur. J'en reprendrai

Bonjour Lionel, merci pour ton retour. Nous sommes ravis que tu envisages de reprendre notre produit malgré la texture initiale. N'hésite pas si tu as d'autres questions ou besoins. Bonne continuation !

M
Miran B. (Slovenia)

2:1 Bar

C
Caffè v.f.A.

2:1 Bar

Ciao!

Grazie mille per la tua recensione! Siamo felici che tu abbia scelto la 2:1 Bar e speriamo che continui a trovarti bene. 😊

Grazie per la fiducia!

Cordiali saluti,
The 4Endurance Team

C
Claudio N.

2:1 Bar

Ciao!

Grazie mille per la tua recensione! Siamo felici che tu abbia scelto la 2:1 Bar e speriamo che continui a trovarti bene.

Grazie per la fiducia e per il supporto!

Cordiali saluti,
The 4Endurance Team

At 4Endurance, our mission is simple

To provide elite-level nutrition at accessible prices for all. We follow the latest science in sports nutrition and use only high-quality ingredients that support your performance. From amateur enthusiasts to professional teams, we support athletes of all levels in reaching their goals.