The most recent trend is to "refuel" with meal replacements and supplement powders, Protein bars, energy bars, beverages, cereals, yogurts and breads that can also alow functional health and nutritional claims. Sport and exercise in the gym or outdoors demand refueling prior to exercise, during exercise and after exercise with different product characteristics for each occasion. Protein bars are fulfilling most of the ‘refueling’ needs of people looking for high nutritional, muscle rebuilding, low GI and lasting satiety effects foods. Protein bars are ideal as a meal replacement and in some case as an "on the go" breakfast replacement. Putting high amounts of highly nutritious proteins are made possible by using high protein crisps as well as proteins as part of the nutritional bar binding matrix. These proteins should convey attributes that will prevent hardening of the bars during their shelf life, maintain nutritional properties, digestibility as well as good flavor profile.