IMO it's an education problem. I used to work in bone density testing and almost universally people were shocked to learn that cola might hurt their bones. Iron

IMO it's an education problem. I used to work in bone density testing and almost universally people were shocked to learn that cola might hurt their bones. Ironically being heavy means higher estrogen levels and a heavier load to carry (which is exercise for your bones) so the effect was sometimes canceled out. But if you don't know that there is a lot of sugar in some beverages, or you don't do the math to figure out how many servings of the "low cal" beverage you're getting when you drink multiple 2 liter bottles a day then you're screwed! Just like activity trackers can help improve health by improving awareness (and yes, maybe some guilt) I still think any food/calorie tracking technology could help. And remember here we're talking about nourishment for which there is a nearly free and readily available alternative; water.