The horrible result of demonizing fats and substituting heavily refined carbs. The generation of dietary "scientists" (use the term loosely because their bias massively overrode good science techniques) that caused this problem are starting to go away, and the current generation is starting to understand the mistakes. Unfortunately, it will probably take another couple of decades to educate people that what they were taught in the 80s and 90s and 2000s was actually wrong, and it will be an uphill battle against a food industry that loves the massive profits they get from selling their variations of heavily processed carbs.
http://www.theguardian.com/society/2...ig-john-yudkin