For years, the term "junk food" has been used to refer to foods considered bad for you, and not very nutritious. But junk can mean different things to different people.
Official dietary guidelines have used more palatable terms such as "discretionary foods", "sometimes foods" and "foods high in sugar, salt and fat". But these labels haven't always made the task of identifying nutritious foods much easier. After all, many fresh fruits are high in sugar and some salad vegetables are low in nutrients – but that doesn't make them unhealthy. And food products such as soft drinks with "no added sugar" and muesli bars fortified with nutrient additives aren't necessarily healthy.
