Does electrolytes drink that contain 1.1 g of carbonhydrate break my fast?

Yes—if the drink’s 1.1 g of carbohydrate is caloric, it technically breaks a fast. But the effect isn’t all-or-nothing: what matters metabolically depends on factors such as what and when you last ate, and carbohydrate can raise blood glucose more than fat. So the impact of that small amount may be limited, depending on your fasting goals and context. 1 2

Some people take a less strict approach to fasting and tolerate small caloric intakes; the discussion emphasizes that there is no perfect solution and that the goal is to do what you can consistently. 3