One of the most overlooked influences on overall health and nutrition. Many people are not fully aware of their full intake. A lot of processed foods are 10% or more sugar by weight including breads, yogurts, and cereals. A few grams in everything you eat can really add up to a lot over the day.
A more noticeable warning label of this food is x% of recomended sugar intake could help, but good luck forcing a corporation to do anything that could reduce sales.
On US labels it has the percentage of daily intake for added sugars not all sugars. So there is some info on nutrition labels but everyone's 'daily' intake is different and is usually more than on the label.