As I was saying in another thread, I've been trying to rein in my carbohydrate and sugar intake. Well, I'm using MyFitnessPal to track everything and it will let you customize how you want your percentages to be, meaning where you want your calories to come from. (How much as fat, how much as protein, how much as carbs.) However, it seems to default to a limit of 34 grams of sugar per day, regardless of how anything else changes. Where is this seemingly arbitrary number coming from? What's the logic in limiting to 34 grams? Does anyone know?