I had excited the powder on longer bike rides through Portugal and southern Spain and am doing. The taste is so that I can drink it if necessary even when the drink is 40 ° warm (at 10h in the saddle and 40 ° in the shade is the ever before). The combination of "fast" calories and minerals there is no performance degradation, either through a "bonking" or by dehydration nor disturbed mineral balance. However, one must keep to the Dosiervorgaben. As my supplies ran low, I tried to stretch it as I was only 2/3 of the amount indicated in the water and was promptly punished by multiple muscle spasms. Since enough calories contained in the Isostar one is also in terms of food for a few days self-sufficient (and food can save weight). Conclusion: Improves noticeably the endurance, on long trekking or biking I do not want to miss it.
