Are there guidelines or recommended “daily allowances” for sugar intake?

You would think so, but the federal government’s guidelines on sugar intake are vague to the point of uselessness and the World Health Organization’s aren’t much better.
Nutritionists agree that many of us eat too much sugar, as well as too many refined carbohydrates like white bread, white rice, white pasta and, potatoes, which are just as bad as sugar, found abundantly in soft drinks, cakes, cookies, ice cream, and candy. What they can’t seem to figure out is a simple formula telling us how much sugar is too much.