I'm curious to know how people actually draw lines around sugar intake. Presumably fruit juice is not allowed? What about foods that have fruit juice as an ingredient? Do you decide based on what the ingredients are, or how much of the ingredient there is? Seems like there's a number of reasonable ways to make rules, but it isn't immediately apparent which one is most principled, or easiest to stick to.
EDIT: Any explanation on the downvotes? I'd love to know how folks draw lines around eating sugary foods. If you've got it all figured out, please share your secrets!