In our experience, one bag's content mix best with 500 ml of water, but of course you're free to adjust this to your preferences. One bag's contents contain ⅓ of an average person's daily recommended amount; in other words, breakfast and a morning snack, lunch and an afternoon snack, or dinner and an evening snack. It's up to you whether you finish the bag at once or if you take more time. In that sense, Vexx is just like 'normal' food, so have some whenever you feel like it. Our only advice: always try to avoid the more extreme appetite, because that might lead to overeating.