Thanks for the reply. I drink about 750ml per hour right from the start. I know some people who drink quite a bit less, I doubt it is that. The dates weigh 8g on average, most between 7-9g, so two should be ca. 12g of sugar. Additionally, the first passes I did this year, I ate less. Drink is 750ml in a bottle, 44g of energy powder in there, that contains sucrose and fructose, as well as electrolytes.