Carbo Bar 2:1 Crispy

Carbo BAR 2:1 (crispy version) is an energy bar from the Yamamoto Sport range, designed for athletes undertaking intense training, endurance activities or prolonged exertion, made from puffed rice, apple purée and enriched with vitamin C.
Thanks to its crunchy texture and fruity taste of apple and berries, it offers a practical and enjoyable alternative to traditional energy bars, ideal for consumption before or during physical activity. The formulation is based on puffed rice and a blend of carbohydrates derived from glucose and fructose, naturally present in the syrups and fruit used (apple, strawberry, berries). This combination makes the bar a source of rapidly available energy, suitable for sustaining the pace of physical exercise and supporting the most demanding performances.

The inclusion of apple pulp, strawberry, mixed berry and cranberry preparations, along with honey and dried fruit, gives the bar a natural flavour and a balanced texture, making it easy to eat even whilst on the go.
Puffed rice, meanwhile, contributes to the product’s lightness and digestibility. The formula is rounded off with the addition of vitamin C, which contributes to the normal function of the immune system and to the reduction of tiredness and fatigue, making the bar not only a source of energy but also a functional aid during periods of intense training.

Thanks to the use of carbohydrates with different rates of intestinal absorption (glucose and fructose, obtained through the hydrolysis of the carbohydrates present in the bar), Carbo BAR 2:1 Crispy helps to sustain performance, delay the onset of fatigue and support the maintenance of energy reserves during prolonged training sessions and competitions. This carbohydrate blend is also optimised to maximise intestinal absorption and reduce the risk of gastrointestinal discomfort1,2,3,4. Glucose is absorbed in the intestine via SGLT1 transporters, which, however, become saturated quite quickly, whilst fructose is absorbed by a different transporter, GLUT5, which does not compete with glucose and represents an ‘alternative route’ for carbohydrates to enter the cell.

Benefits of the 2:1 ratio of glucose to fructose

• Optimal absorption: this carbohydrate ratio allows for the absorption of more carbohydrates (up to 90g/hour) compared to formulations containing a single type of sugar (e.g. a maximum of around 60g/hour for glucose alone), reducing the risk of digestive problems and consequently improving gastrointestinal tolerance.

• Reduced intestinal build-up and utilisation of different transporters.

• Ideal for endurance sports, long-duration exertion and demanding or prolonged performance.

• The most thoroughly researched ratio: sufficient glucose to rapidly fuel the muscles, but also sufficient fructose to increase total carbohydrate absorption without overloading the gut.

The 2:1 combination therefore allows you to exceed the absorption limit of a single carbohydrate, optimising energy supply during prolonged exercise.

Each bar provides a significant amount of carbohydrates (around 32g), making it particularly suitable for endurance sports, prolonged training sessions, trekking and outdoor activities, where it is important to maintain a constant and easily manageable energy supply.

The addition of vitamin C makes the bar not only a source of energy, but also a functional aid during physical activity. Vitamin C helps reduce tiredness and fatigue and supports normal immune system function, aspects that are particularly important for athletes engaged in intense or prolonged exertion.

During physical exercise, especially under conditions of metabolic stress, the need for micronutrients increases: vitamin C also plays a role in energy metabolism and protects cells from oxidative stress, which can increase during training and competitions5,6,7,8. Vitamin C therefore completes the formulation of Carbo BAR 2:1 crispy version, offering targeted nutritional support in a practical and easily consumable format before or during physical activity.

Scientific references

1. Jeukendrup AE, Moseley L. Multiple transportable carbohydrates enhance gastric emptying and fluid delivery. Scand J Med Sci Sports. 2010 Feb;20(1):112-21. doi: 10.1111/j.1600-0838.2008.00862.x. PMID: 19000102.

2. Jeukendrup AE. Carbohydrate and exercise performance: the role of multiple transportable carbohydrates. Curr Opin Clin Nutr Metab Care. 2010 Jul;13(4):452-7. doi: 10.1097/MCO.0b013e328339de9f. PMID: 20574242.

3. Currell K, Jeukendrup AE. Superior endurance performance with ingestion of multiple transportable carbohydrates. Med Sci Sports Exerc. 2008 Feb;40(2):275-81. doi: 10.1249/mss.0b013e31815adf19. PMID: 18202575.

4. Rowlands DS, Houltham SD. The effect of multiple transportable carbohydrates on long-distance triathlon performance. Med Sci Sports Exerc. 2017 Aug;49(8):1734-1744. doi: 10.1249/MSS.0000000000001278. PMID: 28350714.

5. Carr AC, Maggini S. Vitamin C and Immune Function. Nutrients. 3 November 2017;9(11):1211. doi: 10.3390/nu9111211. PMID: 29099763; PMCID: PMC5707683.

6. Grădinaru, A.C.; Popa, S. Vitamin C: From Self-Sufficiency to Dietary Dependence in the Framework of Its Biological Functions and Medical Implications. Life 2025, 15, 238. https://doi.org/10.3390/life15020238

7. Peake JM. Vitamin C: effects of exercise and requirements with training. Int J Sport Nutr Exerc Metab. 2003 Jun;13(2):125-51. doi: 10.1123/ijsnem.13.2.125. PMID: 12945825.

8. Huck CJ, Johnston CS, Beezhold BL, Swan PD. Vitamin C status and perception of effort during exercise in obese adults adhering to a calorie-reduced diet. Nutrition. 2013 Jan;29(1):42-5. doi: 10.1016/j.nut.2012.01.021. Epub 5 June 2012. PMID: 22677357.